Are you afraid of big dogs?

I am not afraid of dogs because of their size~ I probably would be more afraid of a dog because of his breed. I do not like, and am leary of Pitt Bulls. Nothing personal has happend to me or my kids ~ 2 legged or 4 legged has happened. I have just heard too many news stories about Pitt Bulls attacking people, or other animals~ maiming or killing them then the owner saying " He was such a sweet and lovable dog~ I didn't think he would ever do anything like this" The after thought is usually too late.