Again I’ll acquiesce to others that pay more attention to this stuff, but it seems that sometimes the teasers and early dialogue don’t always indicate what is important in the actual scene. For example, Sophia’s leather biker outfit didn’t have much to do with Task 3. Aiden does seem to be quite the expert on women’s fashion for a punk teen.
It has been many, many decades since I’ve been in a high school class, but I don’t recall there being many times when you could hear a pin drop. There was outside noise, hallway noise, students shuffling papers, talking to each other while the teacher was distracted, etc. And if there is anybody who would know how loud to talk without being heard it would be an experienced teacher, and a punk kid who has spent his life getting away with things in the back of the classroom. So personally I’m not sweating that detail.
As far as other students looking back to see if, for example, Sophia is lifting the front of her skirt, or Aiden has slipped his hand under her skirt, yes it could be seen. But it could also be done subtly. And there are times in these stories where chances have to be taken. This is a game where, early on, Sophia let Tyler slide his hand under her skirt and play with her in the presence of her daughter and her sister.