Guild Features
Finer Tuning Restrictions: It would be nice to have an feature that stops players in guilds to just take everything out of the guild bank at once and then leave the guild. Some guilds that this has happened to would understand. Maybe the game’s GMs can punish these players by 1. Transferring items back if they are still with the player (seen as stolen goods) otherwise; strip him down, starting with his golds and 2. Make him suffer, everyday +1g is taken from his wallet and transferred to the “victim” guild’s bank.
That feature is already in place; by giving all new players a customised rank which does not allow them to withdraw from the Guild Banks and Vaults. Further, I recommend to only give the commanders or organizers of the Guild the access to withdraw from Banks and Vaults.
Guild Punishments: Say if a player is in a bad mood and swearing and stuff; then you wont be able to block him in the guild chat, but what if the officers or guild masters could block him from the guild chat?
I don’t think “Guild Punishments” would be a great implementation, as Guilds are intended to be sociable and fun for organizing events, groups, chat and whatnot. To me, adding a punishment system would make Guilds feel more like a prison rather than an extra form of socialization.
If it gets really bad, you could always kick him with the reason, and state that he can re-join at any time when he gets over it – that is what some Guilds do when one of their members starts flaming.