Yes Blaze, it takes A LOT to get me angry and declare war on a person. If you tick me off your most likely to just be ignored.
Last time I guess you could say I showed my stuff was after having someone harass me (because she was jealous and threatened that people were starting to see more competant than her) in the workplace and cost me an 8 year career I had worked like a dog to achieve.
I was ready to take the place apart brick by brick to get at her and went after the company itself rather than her so they'd use her as a scapegoat. Otherwise, she never would have been punished for what she did. I wanted to make damn sure her behavior was exposed so she couldn't do this to anyone else. While I was at it, and since my job was toast anyway, I went after a few more in senior administration that deserved early retirement due to their abuse of their own employees (I had the law on my side in every case and it doesn't matter how big a corporation you are, I just don't scare at that kind of stuff easily. At one point I was telling one of the negotiators I felt he needed a lawyer present because I just felt that he was not a legal match for me - I actually a little guilty because I kept trapping him so easily).
In the end, I actually let most off the hook with a smack on the wrist but I got my point across. Be careful who you screw with because we aren't all sheep. Oh and I also left with a glowing job recommendation.
If you do nothing to betray me or take advantage of me, you have nothing to worry about. Even when you do its unlikely for me to react unless I have something like the above going on in my life.
Then I'm in my "I will squash anyone who tries to screw with me" mode.