I support this Suggestion. if you let people AFK for 10-15 minutes before being kicked, it gives them time to come back. If you get kicked, it frees up space for other players (Not that that may be a problem) but it also decreases entity lag. Some players have this problem and remove the 5-15 AFK people after 15 minutes can make all the difference.
Support. I guess people can afk in their own area if they build an afk pool, but as long as their not bothering anyone else.