only reason they can so perma stealth is beacause they don’t hit you form stealth, thyey wait till stealth wears off lay into u, go stealth move around in stealth wail on you when it wears off, and if we use back stab, Tactical strike or any of our suprise attacks there is a little debuff called “Revealed” http://wiki.guildwars2.com/wiki/Stealth
so instead of congratulating good thief’s, u call nerf nerf nerf because you are not skilled enough to counter them