yeah that happened to me few times. one bad one was I literally roamed the entire desert (without really zoning - too bad it didn't count for explorer title). but yeah nice post on it ^ ^
I've never had LAG thats done this to me, BUT back in the beta stages of GW, I was able to roam around an empty Ascalon City.
Found a glitch with the warp portal there where the trigger didnt go all the way to one of the walls and I was able to run past the portal and into ascalon.