I have been a member of the ACLU for 13 years. I believe in free speech all the way. I would never ever want to censor anyone on their blogs. Whatever you post is your choice.
I love having my blog I feel that it gives me a voice that I don't have in my personal or work environment. I like to joke just about anything-righties, Evangelical Christians, gross stuff-bodily functions, sex, cussing, etc, etc.
There are some things though, that to me, are not a joking matter, and that I won't parody: rape, the Holocaust, people dying-from disease or starvation, and people with special needs. I think with most of those things, it's pretty obvious why I (or someone else) might not want to parody or joke about those subjects. With the special needs thing, though, it seems to be a pretty widely accepted to do in the blogosphere. I am not sure why, but it is.
Having a child with special needs sensitizes you to things. It can hit home. In addition, I have been a teacher to young people with special needs for more than 12 years.
My point: I won't join in/comment on/link with this kinda stuff. That's all.