>>111936Ghosting is far better than what you initially suggested
If she's "in a long distance relationship", she knows who the guy is… Hopefully. And so if he's blackmailing her and she has evidence, then actually he's the one in trouble because he could go to jail over that. Irrespective of what material it is.
If it's nudes or something and she's under 18 it's even worse for him because he would be 1) has material of some under the age of 18 on his computer, and if he sends it to people 2) sharing material of someone under the age of 18, not only will he be fined with the possibility of time, but he also will be on the sex offenders registry.
He has a lot more to worry about. She should be aware that him blackmailing her is already a criminal offence and the cops take that sort of shit seriously, especially for someone under 18.