One of the quickest ways to getting on my bad side is engaging in bullying behavior. There are few things on this Earth that get me as worked up as having to deal with someone who is a bully. But one of those few things is people who refuse to stand up for themselves when they are bullied. If you're one of those people who doesn't take a stand out of fear, then to my mind, you deserve to continue to be victimized by those who pick on the weak.
It is the pathetic coward who simply rolls over and plays the victim. There's no end to that cycle. Resign yourself to being picked on and you will always be picked on, not only because others will directly observe weakness in you, but also because you'll be projecting it in the form of low self-esteem.
And that's about all I've got to say about that.