In Pocket Legends and Star Legends, there is always a handful of rotten apples that needs to filter out.

-A player that does nothing, leeching experience.
-A bear that hides behind the mages and birds all the time, then join in after they get the aggro.
-and more.

These issue have been in several topics as well. It makes a game less enjoyable.

The only way is to improve the Ignore List. I suggest players under the list will not be able to join a game you are in or the other way round. A prompt box will indicate to that player that he/she is being ignored.

The poor little fellow will start to wonder, "Hey why I can't join in most of the game? I want to leech free experience!" (jk)