Guild up and go

You can form or join a guild, a group of players under the same guild logo and name. Belonging to a guild makes it easy to be PK'd, or left alone, depending on a guild's notoriety level. So if Guild B is known for rampaging in maps, where low level players grind, and killing them off for fun, you might want to join Guild B, if such heartlessness is your thing. If Guild A is know for responding with force only when provoked, you might want to join Guild A, if only to be able to PK in numbers, and under the cover of retaliation, if that is your thing.