“Ok. My twisted neighbor across the court has a monthly resistance movement meeting. There are twenty cars parked here right now and I would love to make copies of this and put on their windshields. What can happen to me if I can get up the nerve”
Dress in a suit (or better yet, get a friend to) and go take pictures of the license plates with a large camera. Don’t even need film. Take notes.
Act like your putting a tracker under the car.
Maybe have a dog act like it is sniffing for things.
Oh, and talk into a walky talky. Or at least a phone.
You have a communist cell meeting across from you?
That is a dangerous thing. It would be better for you to watch what is going on and gather license plate numbers and track their movements.