I don't see why you would want to limit the ammount of guilds a person can be in. I personally think that if a guild leader wishes to not have multiguilders then they should instate a rule for their members.
As for the ammount of inactive guilds, I agree. Something will need to be done about all the guilds where no one has worn a tag for a year >.> I'll take time to talk with Stefan about these guilds and probably start erasing extremely inactive ones.