In Snow Crash Stephenson has sociopaths' foreheads tattooed with their particular pathology. Most notably a guy with "Poor Impulse Control" carries around a nuke in a motorcycle side car. Point being anyone can immediately see who they're dealing with.

In light of the US election and mens lack of manners, I want that for me, but "I Stand for Equity, Dignity, Justice" might not fit on my brain pan.