And then there are those, copied on said list of chain-emails and jokes, who stupidly click "reply all" to say something like, "That's funny!" I get emails from total strangers. WTF?
It's an easy thing to click "delete," and that's what I usually do. Recently, though, some stranger clicked "reply all," and then somehow managed to send me two or three new messages. This will not do, I thought, and politely suggested that he remove my name from his list. And he got all up in my face! "Not my bad," he said. Uh... exsqueeze me?!
Edit: skipvia, the worst is when they ask you if you read them--"Did you see that joke I sent you?!"--because then you can't just guiltlessly delete. I work with someone who sends me a joke, then comes over to ask if I'd read it, and tells me the joke verbally.
An increasing problem on social networking sites such as Facebook; unsolicited spam generated by applications that require you to invite friends to try the application before you can use it. I'd also apply the term to jokes that have been forwarded so many times that the message indents take up most of the page...