Not that I know. I personally don't mind much... maybe something like "hey! Glad you like my pic and are using it" or if it's a recolor "Nice edit of my pic, I like it" and something like that, mostly joking but definetly stepping and making presence lol.
But I won't deny I'll go feral if I ever encounter someone trying to profit out of my art, be it making false advertisement with my commissions or tracing up my stuff to give to other people.
I also happen to be an enemy from the Ministry of Culture of my own country since I participated by providing information against a local painter who was copying/plagiarizing/tracing anime art and using it for Exhibitions, Contests, fanzines and straight up selling them on Artsy. (But mostly for her political agenda)