People should read the rules, but you shouldn't need a warning to know that plagarising and cheating isn't ok.
hilarious thats true as common sense ..
what I suggest , there should be a life line indicator for member and only he/she can see it .. like a progress bar in his profile..
it gets increased in
RED if member spamming knowing or unknowingly otherwise remains
green ... it will work as self controlling and reminder,
I have seen that feature on lots of forums to control Member's spamming and it works well , and works better than just 'BAN'
it may help Mods too