I guess it may depend on how often it is happening. So far, I haven't heard of it but that doesn't mean it hasn't happened. The biggest concern is with the article. It just seems too much like a scare political piece.
Yes, it could be a "scare" piece. It also could just be a piece warning citizens of attacks on their rights, which our government, and it's puppets in the media, will do their best to kept that information from you.
Not long ago a young man in Michigan carried a loaded AR type rifle into a town, all hell broke out. He committed NO crime, was not acting in a threatening manner and, despite being illegal under Michigan law, was charged with disturbing the peace.
Funny how we tend to punish LAW ABIDING citizens for doing nothing illegal but we tend to REWARD criminal behavior, like Lord Obama is about to do whit ILLEGAL aliens, (invaders), just as soon as the elections are over. He has to wait that long to make sure that his dictatorship actions don't cost him seats in the house or senate.