Every time that people organize to sign keys around Jeff Waugh he tries to ridicule the keysigning phenomenon by likening the process to intravenous heroin use. He will say something like, "I’d love to sign keys guys but I don’t have my needle, and I can’t find a good vein, and I’d have to go back to my room to get my Bunsen burner."
I think this characterization is grossly misinformed.
Few heroin addicts would ever bother to use a Bunsen burner.