I pretty much think SRD is to heightism what the Klu Klux Klan is to racism.  But I'm not sure we should ban them.  We get a lot of trolls from them, but every now and then, we also get some good people who are enlightened about a topic that they wouldn't know anything about otherwise.  

I dislike the vote brigading, but I think SRD is a net positive....but just barely.  