Death threats are funny, and so is telling him to kill himself. However, sadly, nobody here has the means or opportunity to kill him, and Phil's certainly not going to kill himself, no matter how much you egg him on.
If you, dear reader, manage to get his phone number or home address, don't fuck around. Don't let him get wind of what's going on. Call the police before you do anything else. Call the police before you post his dox, call the police before you phone him and scream "julllaaaaayyyyy", call the police before you get your bag of cement and plane ticket ready. Phil's confessing to crimes, and he's publicly stating his intention to continue offending.
While police involvement doesn't always work (see for example
Pamperchu, a cow who's been openly molesting children for months, maybe years, despite alerts being sent to the authorities), it's always worth a try, and it should be the first shot you fire, if and when you get him in your sights.