This has nothing to do with me persoanlly, but there is nothing that irritates me more than seeing someone going about their day and someone tries to start a fight with them. It's like they enjoy to get off on negativity.
I used to work with a woman who I swear was one of the most negative people I've ever met. She complained about nearly everything that happened all day long. And she had derogatory comments about almost everyone who worked there. She also denigrated the owners, but naturally, she always kissed up to them when they were present. I hated going to work the days she was there, which was unfortunately too many days. I eventually went to overnights just to avoid her. I'm sure she's still there bitching about everything and everyone.