The 'doorbell tape' makes no sense
The movie glosses over many details, which, when you think about them, make no sense.
The doorbell tape is one of those 'cute, clever, funny tricks' that Ferris thought of. Let's think about it.
How does it even work? HOW do you trigger a simple doorbell mechanism to activate a tape player, that then has to also know when the message is played, and rewind it, before it plays it again? I am not saying it's impossible, I am just asking, HOW? As far as I can figure it out, this would require a very specifically engineered system that's not easy to do, especially for some 'cool teenager' that is more interestd in cars than computers (but SOMEHOW can still hack the school's computer... who does he think he is, David Lightman?)
Then there's the mechanical detail of where the tape player system is. Is it near the door? Wouldn't the parents find it suspicious, wouldn't this be one of the things he needs to REMOVE before the parents get home, if that's the case? A weird electronic thing with a tape that says 'DOORBELL' with big letters on it, and the parents are NOT supposed to find it suspicious at all?
I know those parents are ridiculously naïve, but this is ridiculous, not even those parents would be THAT stupid.
Also, why write 'DOORBELL' on the tape with big letters, when the message is pretty darn short, and contains no doorbell sounds? I mean, what is Ferris thinking, trying to hide all these clever shenanigans from 'authorities', like parents, but yet leaves this enormous PROOF lying around? He is too meticulous and well-planned to make a stupid rookie goof like this, isn't he?
He doesn't need to write anything on the tape, does he? What if he wants to use it for some other purpose, then he has to painstakingly either remove the sticky tape and stick another one on it before he can write something else. Alternatively, he can just cross out the 'DOORBELL', so why even write it in the first place?
No matter HOW you slice it, it only makes sense from 'moviemaker wants to cater to idiot viewers'-perspective, not from the 'movie world'-perspective.
Why would Doc write 'Time Machine' on the DeLorean model in the wild west? Why do people that are trying to hide what they're doing, write UNNECESSARY clues and hints for anyone snooping around? Ferris knows what the tape is for, but even if there's a danger of mixing it with another tape (not how mixtapes are born), couldn't he at least write something more cryptic, like 'DBM' (Doorbell-Messaqe) or at least write everything in MUCH smaller letters?
Now, if the tape machine isn't near the door, suspiciously taped to the wall or something, then it must be somewhere else. Where? Let's say Ferris's (?) room. Fine, but think about the wiring. Those wires would be a HAZARD, people would either trip on them (not suspicious at all?), or there would have to be a ridiculously long write going from the doorbell, via ceilings and walls to his room. Not suspicious at all..??
No matter what viewpoint I try to use, it never makes any sense. The writers just wrote it without thinking (what else is new..?), and we get all the thousand stupidities concerning just this one doorbell alone, let alone the rest of the movie.
Why does nothing make sense in any movie? Not even a simple doorbell gadget..sigh.
I think I have already said before that he could VERY easily have made like 20 different messages, so the doorbell wouldn't repeat the ONE message over and over.
I mean, for someone that works THAT hard for a day off, he sure is SUPER lazy for not taping at least TWO messages, when it wouldn't have taken ALMOST ANY extra effort to just keep talking and talking and then instead of rewinding the tape, just making the tape simply PLAY every time doorbell is pushed.
Surely that would ALSO have been the simpler solution?
Think about it - play, stop at a correct point, then rewind, then play. It has to even time it so that if a doorbell is pressed again, the tape must be ready to play. What if it's in the middle of rewinding?
I mean, there are NO benefits doing it the way it was done, and SO MANY bad sides and problems and things that can go wrong. It'd have been SO much simpler to just PLAY every time doorbell rings, and just time the message lengths right (or always talk the same amount of time).
You can look at the doorbell stuff in this movie from 20 different angles and find 20 different problems and things that make no sense, but I think this is enough for one post.
I just wish Rooney's finger would AT LEAST sync with the doorbell sounds, instead of him just holding the button and doorbell ringing multiple times - a pre-determined ringtime (which isn't even consistent, but fluctuates!) is never as satisfying as just getting a DING from the press, and DONG from the release, so you can determine the exact speed of the 'DING-DONG'-sound.
WHY ROB that from the visitor/user of the doorbell? WHY?!