I mean, I don't know, maybe I'm being silly, maybe it defeats the object, but I'd rather use the built in guild functionality?
PHP Code:
addguildmember(guild,account,nick);
//adds player to a guild (server-side)
removeguildmember(guild,account,nick);
//removes a player from a guild (server-side)
removeguild(guild);
//deletes a guild (server-side)