Well, gsxrjack is an older guy who used to race in the mid 80's-90's and he and twisty have been at odds for some time because of disagreements on style of racing and age.
jetskifast and pigface have been at odds for years because of previous problems on the corvetteforum.
In both instances, one or more people will start name calling and things snowball into a locked thread
Some people just like to push another's buttons simply because they can and some others call people out for ignorant comments. I'm not about to say who exactly does what, but you should be able to find enough information from doing a simple search for posts by users. I don't care to get in the middle of things and I think various people have good points and bad points. I'm just trying to give you the information that you asked for.