It looks like the employees doing the security related tasks are members of the American Postal Workers Union, another AFL-CIO union like the mail handlers. So why doesn't Mr. Mosezar call his counterpart over in the APWU and ask them to do their job?
I agree. Common courtesy would have been for him to call the other person to confer with them if he had a problem with the security of the place. Instead he drops a dime on the person to the media, and they run with it. If, after he had called this other person, advised him of his security concerns, and after a period of time, nothing had changed, then you go higher up, but what he did was totally disrespectful. I think Mr. Mosezar might end up getting some flack over it, and rightfully so. It isn't how things are done.