Parents are based as fuck. Thats the way to deal with it, freak out and a typical teenager will dig their heels in through rebeliousness and "fuck you Mom and Dad!" so just don't play along, let them know how ridiculous it is, how they're being foolish, they look fucking retarded, and you'll still be here when they come to their senses, now have you done your homework?
What disgusts me is the Cult of Slaanesh straight away with "maybe its time to cut contact with your parents" to a vulnerable and confused teenager, knowing nothing about their situation, and caring less, sure cut your parents out of your life, the Cult is here to Lovebomb you - until the novelty wears off, they're mutilated and broken and the Cult moves onto the next target, and its the family who they pushed the troon to cut off that has to deal with the wreckage and pick up the pieces.
Just casually advising a troubled confused teen to abandon their support structure, hey, we'll look after you, fly out to the T'Ranch, oh wait, can't, well these other troons two States away will take you into their "Polycule" they're always looking for new kids to "take care of"
Makes me fucking sick.