People do get arrested doing this type of work. It hasn't happened to me, but it has happened to people I know. Usually it is quickly and quietly resolved without the press being involved.
What I believe is at issue here is authority. Can a state entity authorize testing of county buildings? Some people just assume "the government" is one entity. This same type of issue arises in corporate work as well - can a tenant authorize testing against a landlords building? You need to get both to agree.
(Disclaimer: I do this type of work so I might be biased)