For reference my guild city was T2, and i did it on the dagoth server. Sometimes it wouldnt take right away, but usually on the third jump into the wall i would pass through what seemed to be a hallow spot in the wall, then i could walk through the other side. I was able to repeat the results on 4 other guild cities, including a T3 one, and i was able to repeat the results to get inside the inner walls to the keep.
it doesnt seem to work on curved walls, and my guess is because of the multiple wooden supports.
Like i said i couldnt test it on BK's, and since theres no reason to want to get into a normal city since you cant use another guilds vendors, the merit of this really depends on whether or not it works in PvP, so let me know if it does since i am unable to test it at the moment.
