The best idea I have for teaching rationality (in the general sense) is to:
1) explain the concepts to people (ie. explain the idea of consequentialist thinking, and the rationale behind it).
2) have people write essays about thoughts/ideas they have (they should be excited to write these essays), and then peer review the essays, pointing out errors in rationality. Like not supporting claims with evidence. Then have an instructor go over the essays and the evaluations to make sure they did a good job.

Also, I think what you're doing right now - crowd sourcing - is probably the best thing for idea generation.