yeah...work place politics! My suggestion is to find a wording of a sentence comfortable to you, fitting to you, and repeat it to anyone to tries to get you involved. The gist of the sentence is that you have thought about how everyone is different, and have different needs, and you really don't feel qualified to comment about anyone else...

This way, no matter what you might have been dragged into in the past, it excuses you from future clique membership. It should imply that you have re-thought your actions and feelings, and just ain't gonna play!

<font color=green>...I can misspeak like the best of us</font color=green>