/index.php/topic,4314That shows in console.
To use XGUI, manage groups, select admin, select ulx ban, add !%admin to the can target field.
Personally, I'd recommend removing admin access from anyone that bans another administrator.
I can't imagine Megiddo keeping me around because I banned Stickly 'just for fun', or even worse, cause I felt like it and was having a bad day.
There's one security issue that could pop up... if another admin's access gets taken over, or another admin goes on a emo spree...you're fellow admins won't be able to keep control by removing them until a superadmin got there.