Last I ate an earthworm I must have been five, or was it a tapeworm I had?:lol

They got it completely wrong in two counts:
1) Tequila never includes a worm, it's Mezcal that may have it.
(see the mixed drinks thread buried in the pages of this forum for more info on the difference between those two distillates from agaves)
2) The worm used is a worm native to the maguey (agave) plants, not an earthworm at all. Those worms are also eaten fried and salted as a snack in Oaxaca.

They got it quite right in something: worms are very nutritious, one day I shall try them, who needs soy flour to get more protein when you can get worm flour?:)
And insects are also considered very nutritious and are eaten in many parts of the world, including Australia, Japan and other Asian countries. Insects are also eaten in Mxico.

BTW, I wanted to try tacos de chapuln (fried grasshopper) and some of those agave worms when I was in Huatulco, Oaxaca, but didn't find a restaurant that served them, maybe they tried to appear "normal" for the tourists.
Insects have been eaten in Mxico from prehispanic times, in some center-south regions they are sold in the traditional markets (mercados), some are eaten live actually, I knew a little about that, but only saw it for real in the US Food Network recently. One day I shall try that. Something considered a delicacy in central Mxico, and that supposedly could be found in some places in Mxico City, are escamoles, ant larvae.

The United States has some weird things too, insect lollipops, chocolate covered insects and more....
If the temptation is big enough you can even order them online. Please chirp in after you do.:)