Isn't there also a physics angle to antimemes (as portrayed in TINAD)? Self-erasing information sounds like a reduction of entropy and should therefore be a violation of the Second Law of Thermodynamics, no?
Of note, information is actually pretty low entropy in general, there are only a few confined states that information is valid in. Erasure just makes it statistically hard to recover the information in a usable timeline. So going from a sequence of 1's to a sequence of any number is increasing entropy.
If you go through the solution to Maxwell's demon it will help here too