Prediction markets can be considered as some sort of alternatives. This is absolutely different technology, but with similar results - motivating anonymous people to do something special.
Here are 3 projects which in theory may permit betting on delicate subjects:
1) https://github.com/AugurProject/augur-app - installable application
2) https://fairlay.com/ - web site
3) https://omen.eth.link/#/liquidity - web site (but you need to disable ad-blocker)

(for future exploration)