Follow-up idea, probably silly:
Robogranny Olympics. Allow people to submit their own bots, Micromouse/koth.org/Battlecode-style. Bots are run on random phone numbers for several weeks, and are ranked on average call length (total time/num calls). The robot that can keep spammers on the line the longest wins the prize.
A condition of submission is that the bot code and weights are published (not open sourced, just published). Competition is repeated yearly.