Sometimes I do, and I can get a little weird. Like one time I was talking a little bit like Cheech and Chong would, adding "man" to everything.
I was in the hospital ER for an infection that was worsening and the young nurse who must have been told by the people spying on me about that (just to be clear, I don't think EVERYONE is spying on me, just people inside big tech companies, maybe some family members, and/or some kind of MK Ultra like evil psychological experiments program, who then share that with certain people I cross paths with, to manipulate them, maybe turn them against me) did the same thing - edit: specifically the Cheech and Chong, man at the end of her sentence - while at one of her machines. I think she was mocking me.
The spying is what bothers me much more than the mockery. Why are people mocking me for things I did while alone? Seems like a concern a sane person would have. Pretty reasonable.
I am an autistic misfit, so used to being mocked. The constant spying AND the mockery together is deeply troubling and enraging, though. I think I'm right about that.
Oh, I think people could find much to laugh at or entertain them or whatever it is they might want to do while spying on nobodies like us. I worked briefly at a big health insurance company and people would look up celebrities in the database. Why? Boredom and curiosity, I guess. Oh, look, that judge from American Idol had weight loss surgery. They didn't take the privacy rules very seriously. I remember them looking up Spielberg and being surprised there was nothing there.
Most of the stuff you do during the day would be boring, but I think there are times that most people get up to something that other people might find at least a little bit entertaining, for one reason or another.
Many people say oh, they wouldn't see much anyway so I don't care. Really? Family arguments? Embarrassing moments? Showering? Sexual activities? Talking about your sexual activities? Maybe someone makes a funny sound when they are excited.
People who say what you do, I've heard that take often, probably don't believe it is actually happening or I guess haven't thought it through.
There are other reasons they might do something like that. Maybe someone posted something they don't like, a bad opinion. That person deserves it for being on the wrong side of history. Boredom and some kind of tiny grudge could lead people to target someone, I think. A lot of things could.
This goes further than that, though. It seems like they are manipulating people around me, maybe turning them against me, having them play mind games and gaslight. I have no idea why. They don't like me for some reason? I'm pretty isolated, socially. For all I know it's part of a government program, maybe some psychological experiment that's extremely unethical. They've done things like that in the past.
I tried to explain that there might be other reasons that they'd spy on people than their importance. Boredom, amusement, spite, vigilante justice, secret, unethical government psy ops.
All people talk to themselves, even though most people don't say it out loud.
The ones who do often sound weird, because what you hear when listening to them isn't the whole thing, it's just the part they say out loud, ripped out of context and that usually makes no sense.
I don't think that nurse was mocking you, I think she's simply one of those who say part of it out loud when she talks to herself.
My wife is having fun with it, because when she hears me saying half a sentence that makes no sense, she's trying to guess what the whole sentence would be and what the context of the sentence was.
The Cheech and Chong like man at the end of her sentence is what got me, not that she talked to herself. The timing was something. If it were a one off, I wouldn't be so bothered, but this kind of thing is a semi regular occurrence in my life. Multiple people I know - who don't know each other - bringing up Harlan Ellison, who's known to science fiction aficionados and maybe big fans of the Terminator movie, but none of those people were any of that.
When I was hospitalized, several nurses came in making this weird doo dee doo dee doo sound at different times. Playing mind games? Mocking that I sing along with songs when I'm alone (maybe not so alone?) in my apartment or car.
I believe you're overthinking.
You're imagining more than is really there.
Since I am doing this myself I have an ear for others doing the same and I can tell you, many people simply have often the same things they talk to themselves about, they aren't copying you to mock you, they simply have the same thoughts.
Occasionally one picks up something from someone else, but that's not mocking the other either, that's because you really pick it up and can't help it.
Good examples are songs that you don't even like much, but for some reason get stuck in your head for a while and you keep singing a few lines or whistling the melody from that song over and over, where (if you do part of it loud) others pick up which song that is, get it stuck in their head themselves and can't help singing or whistling it as well, just like you couldn't help it.
If you start from the assumption that nobody else talks to themselves, then it's easy to get the impression they are imitating you and the thought they would want to mock you is the next thought, but once you're aware that everybody does that, doesn't that give a whole different situation?
Well, sorry about being an autistic misfit, and thus being mocked.
I'm sure it is difficult to go thru life that way.
Anyway, onto your question.
No, not insane, but, if you are talking out loud to yourself, yes, it will be viewed as odd. Many will make fun of it.
A preferred method is, you can talk to yourself constantly. I do, there is stuff going on in my brain pretty much at all times. Just keep it in your brain - you don't need to use your voice.