They are here because they get responses. The only way to get rid of them is to never respond to them and put them on IGNORE. They make outragous comments and then keep watching to see all the responses they get. Once they see no one responding they will go off to riper trees to shake.
So do you really believe that all this talk about jews and arabs dems and republicans on this board effects the market? I bet that there are no more than 7 people that look at this nowadays (although there are many alias's).