I know, I know, this is one of my BIGGEST pet peeves. If I get an email that has a "send this to __ people or else" message on it, I never send it, even if it's the funniest thing in the world. The thing about the dancing taco bell dog --- the thought alone was funny enough for me, I didn't send it.
A little off the subject, I will, however, tell you one that I fell for, hook, line and sinker (so MaMa, don't feel bad)

. ---> How many of you have ever recieved the email with the "magic" eyeball on it and the deck of cards? You look at the deck of cards, then pick one, stare at the eyeball, and then flip to the next screen. The email then says they are "reading your mind" through "mind manipulation" via the eyeball, and when you flip to the next screen, the card that you thought of is not there. Ya'll, I seriously freaked out and stepped back from the screen. When I figured out the secret (it really doesn't take rocket science) I was like --duh!!--