I don't go into Sardz much as its to much of a bitch to take between the pkers in the hall, blockers at every door, trying to run through a room full of sliding spikes in the middle of a bunch of your guild mates/other people that block you up and cause you to get hit,then you have to try and hit a flag while the defenders continually re-spawn right there no thanks.
I do tower at Mod a lot and I did see people seemingly glitch into mod and swim around by the stairs and even block them some what unintentionally.