Mine would be to remember that dignity outweighs notoriety.
Better to to be known for something good or low-key than for to be known solely for something messy and bad. The temptation can be there to lash out and be the talk of the town, but it's not worth it. Stay classy!
Know that these are internet strangers and that you are here to discuss people you don't know and things that don't affect your life. Do not become emotionally involved. Don't post too much. Do your BEST not be annoying.