Think about the time when the movie takes place. I was a child in the early eighties and did the blood brothers. It was perfectly safe back in the day. I'm not sure what's wrong with shooting water out of syringes?
1) The blood brothers scene was set in a pre-AIDS era. In the UK, there was a warning about copying this scene when the film first aired in the 90s though.
2) The scene focused on the fact that the kids saw the syringes as water pistols and nothing more. Also, in a far more innocent age, kids didn't think associated syringes with junkies.
"I always pretend to root for Gryffindors but, secretly, I love my Slytherin boys."~ Karen, W&G
Yeah really, duh! What nurse is going to give kids syringes WITH needles in them to use as water guns? Even for the 70s they had more brains than that.
I swear people have just gotten over sensitive. We're becoming a nation of crybaby wussies. In that day and age the blood brother thing was not uncommon and I'm sure plenty of kids including myself shot water out of a syringe a a time or two. It's called playing!