When I am rendering scenes with kinky storylines, I quite often put the characters in public humiliation scenarios that require bystanders. The problem is that my computer is only so powerful, and time is never on my side, and given that I'm not the only creator who has explored these types of storyline settings, I thought I'd suggest there may be a market for the first public humiliation billboard set, as so far there aren't any.
There are many settings this could work with, for example.
A college setting, where students from all different backgrounds and cliques respond to the subject of the scene with a mixture of mockery, pity, and disgust. They could be filming them on smartphones, pointing and laughing at them, or expressing pity and disgust.
It could also work in a more formal setting with smartly dressed people doing the same thing. This would work great at a fancy dinner party, or rich bystanders attending an auction block, or a business meeting with a domineering boss.
Just a suggestion.