Patroll

A patroll is one or more (hard to tell numbers) of trolls that are not seeking controll of a large public wiki or other public space, but do seek to detect and oppose any impediments to trolling.

For example, in Norway where many trolls live and are accepted as part of the community, blocked roads that provide access to areas where the government does not want the public seeing what is going on, might be unblocked by a patroll. Local villagers when asked will say "the trolls did it". This is considered an acceptable official answer in Norway, since such incidents are rarely or never investigated.