This thread comes up once ever three months, somewhere. It’s an outrage searching for a reason. As a practical matter, there is very little interference between government officials and casual photographers.
Whatever strum und drang there is can almost always be solved with calm, honest communication instead of getting yer backs up.
Photoblog – Is photography a crime?.
Carlos Miller tirelessly advocates for photographer rights on his blog; Photography is Not a Crime. He is particularly interested in the times when photographers intersect with what he claims are heavy-handed police tactics. I’m a reader of his blog because the topic comes up often in the photojournalism industry.