Guild Wars 2’s Guardian Is A Master Of Self-Sacrifice By Mike Fahey Published January 27, 2011 ...

However, the worst part of becoming Guild Master is still all the radiant quests. While players only need to do 20, they don't get credit for missions in towns where the Guild already has influence.

One of the most interesting new but unannounced changes: Patch 4.3 looks to bring with it a mechanism by which you can impeach an inactive guild master.