Driven off by trolls
Users may declare themselves to have been driven off by trolls or others may claim that they have been so driven off. Either way this trollish phrase is a claim that a certain faction now has control of participation, for good or ill, and challenges other factions to assert themselves or forever lose control of the wiki. Permitting users to leave citing this objection, or permitting trolls to brag of this result, with no response from authority citing Wiki Policy, will tend to result in a disrespect for authority as such, and possibly to the later utterance/result: "trolls have taken over".
This may be good or bad for the mission of a particular wiki.
If all users are trolls then this phrase simply means that the wiki has become fully majoritarian and that a majority faction has disabused itself of an unwelcome minority. Note: this is not the same as becoming a democratic domain and not as good as working by consensus.