ROFLOL, yes the steel fence and the millions of security cameras and guards with dogs and guns, were not enough warning. "Correctly posted", LOL, Good One!!!
All of that means nothing in the way the laws are written.
They are very specific for posting trespassing warnings, fences, guns, dogs don’t mean anything if you walk right by them. Believe me, I own a lake and unless it is posted exactly like the law says then they can’t arrest anyone for it, at least here they can’t. It’s why I have to replace the signs a couple times a year, once someone tears them down at night I can’t prosecute.
This incident should give chills to all the “ordinary folk”, who think federal agencies can completely protect them from terrorism, etc.