were equivalents of "I am a .sig virus. Please reproduce me
in your .sig block.". Of course, the .sig virus's memetic
hook is the giggle value of going along with the gag; this,
however, was a self-limiting phenomenon as more and more
people picked up on the idea. There were creative variants on
it; some people stuck "sig virus antibody" texts in their
sigs, and there was at least one instance of a sig virus
eater.