There aren't any. If you want there to be some, imagine them and don't become leader of all guilds
Player imagination > hard coded limitations that effect everyone oh god
Especially for small things like that
Oh yes, hard-coded limitations are such a pain. You know what other hard-coded limitation I dislike? Having to do quests to get to the head of a guild. Oh god, it's just too restricting. You should just become the head of a guild right when you join, and then then those who wanted to rise up the ranks with quests or skills can just imagine that those quests are required to advance.
You know what other hard coded limitations svck? Having to pay fines or go to jail to get rid of bounties. I think bounties should be removed for free just by talking to a guard, and then those who expected to have to pay a fine could just bribe a bunch of people or go to the nearest dungeon and wait a bunch.
[/sarcasm]
"Player imagination" is the most BS excuse ever regarding things that 1) the game is capable of conveying, 2) the game is not stylistically opposed to, and 3) contribute to a more believable environment for the player to explore in. Creating a backstory for your character is a proper use of player imagination, as the game is stylistically opposed to telling you what you were. Embellishing on things that don't occur in the game (like RPing massive 10,000+ member armies) is a proper use of player imagination, because the game is not capable of conveying such scale.
Saying, "I want to become the Arch-Grand-Master-Listener-Fox, but I don't want to put any extra effort into earning that title, so all relevant mechanics should disappear and be replaced with player imagination," does not fall into categories 1-3. Instead, it's saying, "I don't want challenge OR believability in my game, and I'm willing to sacrifice both (not just for me, but for everyone else) so that I can quickly and more easily
earn take the title of 'uber.'"