I've had a lot of that as well, throughout my life. It's pretty "rough" alright, especially for more "sensitive" people (which most SA'ers are).
As powerfulthoughts said, try to regard it as something which you need, in order to "grow" as a person. So in effect, they are helping you (although they are probably unaware of this fact, at least consciously).
As long as it (the laughter/ridicule/etc) still "kills" you, then there is still (inner) work to be done, more learning to gain.
I know i still to this day, "cannot handle" when people openly mock/laught/etc at me, which is one of the reasons why i don't "live in society", but instead practically avoid all of it.
At the time, it is a MIGHTY challenge NOT to react to it. I think the key is to work on your MISbeliefs. For instance, it might actually be for them, rather than just cruel/merciless/animalistic attack, but more of a self-defence mechanism, they might feel nervous when you're around, and so joke/laugh to "lighten the mood" (rather than intending to make you feel bad). You know, that sort of thing. DON'T assume you know all about the why's & wherefore's of any situation involving people; people are very complex creatures, strange & complex, a combination of many different things, and quite a few contradictory & unexplainable things. So instead, you should ASSUME that you DON'T know exactly what their motives are, what they are saying, how they view you, how your "human worthiness" compares to theirs, etc, etc.
I'm dragging on here .. but i have hopefully given you a few points to consider, with the help of my past experiences
NEED (mistakedly pasted this word here, but will leave here, as a last word to summarise what i have said)