> should we presume this was strategically ordered by upper management and not just someone at the location just assumed outside material wasn't allowed?

They don't even need to do that. It's far smarter to set a policy forbidding that, then set up the incentives so some lower level guy feels a lot of pressure to break it. If he does, he's your fall guy. That way you can have your cake and eat it too: unethical conduct to support your objectives, muddy enough waters to shield you from blame, and a nice little PR show about how ethical you are and how much you care.