So, I don't want to use a system like this to generate actual fines. I want to embarrass people who are speeding through my neighborhood at 2x the local speed

So, I don't want to use a system like this to generate actual fines. I want to embarrass people who are speeding through my neighborhood at 2x the local speed limit, just because they can. In some cases, including school buses. Uploading only the most egregious cases to YouTube on an automated basis would make me happy.