In regards to being stopped by cops
This occured to me about 4 years ago but I thought I it would be worth sharing. There was a cop working detail by the Chinatown T-Station, and I must have passed him 6 or 7 times. On the 8th he gets right in front of my car and called me out by my last name and told me to get the hell out of there. I would assume by my experiences that even though LE can arrest you it is faster to scare you and get rid of you than process the paperwork on a arrest.
Just be polite.
The Local Brit