No Thank You allows you change how errors appear. You can change them to appear in chat only, or in a pop-up window only.
Suppress Error Message hides all error messages. (Not something I'd recommend... but, it's there.)
I hope this helps.
Edit: Ohhhhhhh.... this guy has me on his ignore list because he can't take criticism. If someone would like to relay those two addon suggestions to him, that'd be great.
