Untrusting parents

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So I know some parents that won’t let their teenagers do anything because they don’t trust them. I understand you need to be able to look after your kid and make sure they’re safe but I think they go too far. They won’t let their teenagers mostly 15 and 16 year olds go see movies with friends that are over a pg rating and they must go with the parents. Other things as well as not being allowed to go to the mall, installing devices on their phones to see what they’re doing as well as track them. And a bunch of other over protective things. I am all for parents having rules and discipline but the reason it alarms me is this. They don’t trust their kid (even if they’re always good, get good grades etc.) because apparently ALL teenagers are dirty troublemakers that will just have sex, do drugs, drink and cause commotion. I wouldn’t feel the need to comment on it but I feel like the kids of these parents feel very isolated and upset. I was wondering what people here think of it and if it’s too much for the kids.