Kicking, or Vote Kick is a new feature in v1.8.3.1.
Kicking (Clan Server)[]
Clan members playing on clan servers which their clan "owns" are allowed to kick players on that server. Players who are not part of the clan which "owns" the server can still vote kick players.
Vote Kick[]
All servers have vote kick, even clan servers. Depending on the number of players on the server, the number of votes needed to kick a player changes. Any player can start a vote kick.
Since v1.8.3.3, 65% of votes are needed to kick registered player from regular server.