Maybe we need a "Best of Spammers" sub? We keep getting spam submissions so maybe the funny or "Huh?" ones need to be enshrined.

Most persistent gets a ban?

What I've found is barely anyone want to do this. Having done it myself on another website it's not hard to see why. I was often spending half hour a day on it which soon became a chore. The spammers don't spend any time at all because it's mostly automated but soon come out of the woodwork to complain when they are banned, so they are definitely monitored.