In my experience, by about 6:15 without a bracelet, you are the enemy and some CMs are rudely trying to push you out of the park. We've managed to selectively not hear them until about 6:45, but by that point, you really have no choice but to exit. Now, I have been allowed to use the restroom by City Hall a few minutes before 7. It's interesting, because some CMs really seem to respect you don't have to be out of the park until 7, but others were downright rude too early.
I've never violated the rules, always been past the exit turnstile before 7, but sometimes I've felt like a criminal as the witching hour approaches. BUT, not by all CMs.
I think as long as your plan is to be out the turnstile by 7, it's still a good day to go. But if you are still trying to be at the back of the park at 7, you'll find yourself escorted out.