I had an idea for a modern art installation that would look like a big box you could put in a public park or square. Then, cameras around the box take pictures of passersby and do face recognition against mugshots. When a criminal is found a spotlight on the box illuminates the passerby and a speaker announces their crime. I figure if you felt bad for criminals (or were lazy) you could also just make it illuminate and accuse random people.

I will never actually do this - but it seems like it is modern art that would be attention grabbing, getting headlines, and make some kind of point.