As someone who has played EVE online for a very long time, this is baby stuff to me.

On EVE, there have been full-scale white collar heists into the biggest Corporations(EVE's version of guilds) to gain bank rights to steal trillions of ISK. That's the kind of stuff that constantly puts EVE in gaming news. On that game it's pretty much an accepted fact that you have to be careful of who you can trust, it's a major draw of the game.

Though the system is different on EVE, only the LEADER of the guild can promote people and Directors(Second in commands) have all other rights, including accessing the guild bank. Normally you will have people basically become your best friend to be your director, then they swipe all your money and delete the account. Heck, there was one instance where a whole major guild was created and when they were close to reaching the top, they swiped all of the donated money and disappeared. Yet EVE is possibly one of the most well known and popular hardcore MMOs out there.

This is a lesson for all FCs, stop arbitrarily giving powers away. Organizing an FC is arguably "hardcore content", you have to be prepared for developments like these.