Bashers, it's an old subject.They've always been around, and they will always be around. In one sense, they are a mark in favor of the object of their attacks in that the stocks are recognized as being both tradable and subject to manipulation (among the less-educated investors.)
However, in my opinion, bashers thrive on attention which serves in helping to sustain their attacks.
The best response is not to reply, don't reference their postings, AND put them on ignore! Too few do this, however. So sad!