Alter Aeon Online Help

Keywords are:  'group leeching leeches leaches leaching'

A leech is a group member who is idle or AFK for more than 20 minutes.  The
difference between a leech and a group bot is that a leech contributes
nothing to the group - leeches do not assist, cast spells on others, tank,
maintain minions, etc.  Leeches can cast spells on themselves.

If you see a leech in your group and wish to warn other players, you can
report it using the 'report leech' command.