I mean just let him/her sell low, he/she will regret in the near future when price is up, it obviously hurts the community and the project, but it´ll be quick I guess, once he/she finishes dumping price will go up naturally.
While I agree that person is full of sh*t, it is a free, open and decentralized market, (even though stellar doesnt seem to be that decentralized, but anyways) so from my humble opinion I don´t think warning people and posting ban threats coming from devs it is a good idea for the project itself. That being said, Im all for CharnaToken, I put half of my tokens for sale in a spread that goes from 1.99 XLM up to 6 or 7 XLM per Charna, the rest Im gonna Hodl.
Cheers CharnaToken!