We were thick with them here back in the day.
Jethro Tull is the one I remember most.
I told him his fears were irrational, and he told me he hoped my family and I all starved to death in a government concentration camp because I wouldn't listen to him.
In my defense, I was scouring the internet archives to give links to his nuttiness. The closest I could come was this:
http://www.freerepublic.com/tag/by:jethrotull/index?more=208488.
(FR flushed all thread contents prior to 9/4/2001, but the titles exist.)
I liked Michael Rivero.....