But cops do the same thing in areas with high auto theft rates. They set up "bait" cars and wait for someone to steal them, then arrest them. It's no different. I don't see how this would be a form of the GWs being unnecessarily forceful or expressing too much authority.
IMHO if you do nothing wrong, you should have no problem with the GWs being out there doing everything they can to catch those who aren't so law-abiding. I'd rather be stopped by a warden every time I'm hunting or fishing and know they're out there than never get stopped.
I wish there were 100X more wardens out there than there are, but that's not something that's feasible. Hopefully these sorts of tactics will not only get the offenders that are caught off the wrong path for a while, but also serve as a deterant to others who might consider violating.