This is a very serious CHINUCH question that requires more than a bunch of comments from strangers. I did confiscate a machine from my 15 year old and have it in hiding for almost an entire year.
My son is pretty cool with it and has actually had a very good year. Occasionally he asks for it back and i change the subject.
I did not turn him off by doing something rash nor did I let him destroy his life (this world and the next) by letting him watch all the Tumah.
Every kid, parent, family is different and must handle things in a way that fits the individual situation…
There are many Chinuch experts in Israel to speak with
R Orloweck
R Brezack
R Rotman
etc…
You must get Hadracha from a Chinuch expert.
It’s Pikuach Nefesh on both sides