How do you define "violence" ? According to [0] I would have thought that sharing intimate pictures could very well be psychologically harmful and therefore would be a form of abuse. While I'm not sure what the legal definition of violence is (different per country I imagine) I'd imagine that abuse is a kind of violence.

Besides anything else, surely a basic moral compass suggests this is wrong, and on a different part of the spectrum to "copyright infringement"

[0] http://definitions.uslegal.com/p/psychological-abuse/