It's been my experience here in PA that YES WCO's can and will do this but their intent is not to just walk around willy nilly disturbing people's hunts for giggles.......I was told that in almost every case where they are questioning hunters on stand that they are pursuing a tip or a lead for a reported violation in that immediate area.
In following up on that leadit's probably necessary totry to check as many people as they come across more or less kicking the bushes and see what flushes out, especially if the descriptions of the violator/s is somewhat vague.