Yes I have. I have been in a foul mood and taken a cheap shot at someone once before because we were disagreeing about something. I realized that my response was out of line and PMed the poster to personally appologize for my words and tone. Other than that, I honestly think that some posters on the board can breed negativity and it is just drawn to their posts just by being who they are. So sometimes you don't have to be in a crappy mood before you get here to get caught up in negativity and sarcasm.