Its not Mod Abuse unless they leave it up after the owner tells them to keep it.
Its literally just a harmless jest.
Mod Abuse is like Deleting comments because you didn't like it, not cause it needed to be deleted-
or dissaproving a meme and banning a user cause you dislike them
Unless its not causing a problem- Changing the titles on images isn't mod abuse- and if you removed people that did this. we'd have little to NO mods cause trust me- everyone has done it atleast ONCE on this stream