I used to send similar e-mail to people that sent me forward/chain e-mails. I think after a while all those people removed me from their contact list. Heh.
These days, I tend to feel the ignore button for random, greetingless, friend requests suffices. That said, I know the feeling of a happy sigh and I reckon I might respond to the next one I get. :)
I tend to do a lot more of the ignore button response these days for sure, but yeah, every once in a while it's good to just get the irritation out of your system. ;) haha