Is there a more apt description for those dedicated to upholding the 'right' to traduce and malign with lies?
If there is, I can't think of it.
I don't think you have the correct definition of 'troll' ferryman. Posting honestly held opinions is not trolling. Deliberately disrupting and attacking others on a forum or thread is trolling.
troll
One who posts a deliberately provocative message to a newsgroup or message board with the intention of causing maximum disruption and argument
someone who leaves an intentionally annoying message on the internet, in order to get attention or cause trouble
› a message that someone leaves on the internet that is intended to annoy people:
is a person who sows discord on the Internet by starting arguments or upsetting people, by posting inflammatory,[1] extraneous, or off-topic messages in an online community (such as a newsgroup, forum, chat room, or blog) with the deliberate intent of provoking readers into an emotional response[2] or of otherwise disrupting normal on-topic discussion,[3] often for their own amusement.