Sounds like sour grapes to me. Although you have just as much right to hunt a area as much as anyone especially being there first ,but it sounds as if you're more jealous than anything else.
I've built permanent waterfowl blinds on WMA and never had a problem. I used to hunt only on the weekdays and beating me to them was next to impossible as I'd be in one and set up 2 hours before shooting time. I didn't hunt on the weekend or holidays so I'm sure that they were enjoyed by other hunters. On public land it's first come first serve, as long as a person that builds one understands that there shouldn't ever be a problem.