Are you referring to a particular instance where someone did this and was not punished?
Texture theft and plagiarism are things we do take very seriously but as firebolty said, it is circumstantial. Sometimes we may not infract but I don't know of any time a report of something like that was received and it was ignored. At the very minimum the user will be contacted and given an explanation of what they did wrong.
I'm having a hard time understanding what you're getting at with this. :s
the "better punishment" you are suggesting, is just regular punishment.
are you suggesting they punish people like they normally do?
There's no need to have a better punishment, I think if Staff Moderators see a guy who doesn't stop stealing they will give a decision together