From another website (about lexicology), this is what members may not do:
"post materials that are unlawful, threatening, harassing, profane, defamatory, vulgar, obscene, libellous, deceptive, fraudulent, contain explicit or graphic descriptions or accounts of sexual acts (including but not limited to sexual language of a violent or threatening nature directed at another individual or group of individuals), invasive of another’s privacy or hateful"
Extensive as that is, it doesn't cover trolling very well. Only the hateful and harassing seem directly relevant..
This definition of cyberbullying seems to come closer to operationally defining troll behaviour.
"Examples of what constitutes cyberbullying include communications that seek to intimidate, control, manipulate, put down, falsely discredit, or humiliate the recipient. The actions are deliberate, repeated, and hostile behavior intended to harm another. Cyberbullying has been defined by The National Crime Prevention Council"
(Unfortunately attempts to "put down" someone else features very regularly on WP, however as the old saying goes, one swallow doesn't make a summer...)