>>845512>deprive her of privacyNo one said to deprive her of her privacy. Taking a lock of a teen's room =/= depriving her of her privacy. She can still have her door closed and have her privacy. But the lock or the key needs to go so it can't be abused to avoid education. Her parents need to have access to her room to intervene when neccersary. But only when neccersary, again privacy invasion isn't the intention here.
>deprive her of her internet accessOnly as a consequence of not following her online classes. This is completely up to her, she can have her internet access when she follows her online classes as she should. If she gets her internet access taken because she refused to follow her online classes that's her fault and something she could've prevented herself.
>forbid a teenager from engaging in fandomsThe other way around actually. If her internet access is taken because she didn't attend online class and as a result she can't engage with her fandom, then it works the other way around too: If she attends her classes she gets rewarded with internet access and therefore the opportunity to engage with her fandom. So the fandom can be used as a motivator to get her to follow her education.
But those are my two cents, do with it whatever you want OP.