My friend got addicted to flanger.

I was talking to him and he was like: YO BrOoOoOooOoOooOo. And i was like: What???? And he was like: I BoUgHT a NeW fLAnGeR eFFect.
What should I do honestly, he will relapse soon… and he has been of the chorus for a year now, but now this. His poor voice…