But can law enforcement themselves be entrapped? That seems to be the extraordinary claim of the Racine, Wisconsin police department in the case of an open carrier who was arrested for obstructing justice after he apparently refused to identify himself when officers began questioning him for open carrying on the porch of his own home.
The facts are still emerging, but reports seem to agree that officers were in the neighborhood where Frank Rock lives on Wednesday night investigating the shooting of one or more raccoons. While in the neighborhood, officers noticed that Rock, sitting peacefully on his front porch, was openly wearing a holstered handgun, which is legal in Wisconsin, and began questioning him. When Rock refused to identify himself or answer their questions, officers arrested him, charging him under Wisconsin statute 946.41(1) which reads:
Whoever knowingly resists or obstructs an officer while such officer is doing any act in an official capacity and with lawful authority, is guilty of a Class A misdemeanor.
The issue then becomes a twofold inquiry. First we must ask whether the officers were acting under “lawful authority” when they questioned Rock about his legal activity on his own property and secondly, whether his refusal to answer their questions rises to the level of resistance or obstruction required by the statute.

Wow … It sure seems that the officers overstepped their bounds in this case. And it appears that they know it; because their first reaction when questioned was to claim that it appears they were “set up … to see how they would react to open carry.”

No, they know where their limits lie, that's their job - to know the law, and enforce it. Not stretch it when convenient, or when they feel like harassing someone for using their rights.

We expect (and hope) that they don't stretch, bend or blur the lines. They do know their limits, and how to exceed them. If they admit their mistakes, then they'll get what's coming to them. If they deny deny deny, they're let off with a slap on the wrist.