If a group of regular players is trying to keep their characters at similar tiers, is it possible to complete mods at the greater difficulty setting, yet have some characters claim the lower XP reward?
Or, more openly, is it legally possible for players to somehow opt to recieve less XP through actions such as denying quest rewards, etc? Are DMs legally allowed to choose to award less XP on player-by-player basis?
If any of these options are legal, can you predict avenues of possible abuse? If any of these options are legal, would you be upset if you had found out a player at your table had done it?