Try sheltering every "idea" on an open source issue tracker and report back with a nervous breakdown in a year.

Most ideas are stupid and don't work. Startup ideas are increasingly stupid and only work because many startups are know to fail by the investors but used as a vehicle to transport money from A to B with plausible deniability.

Open source bug trackers tend to not appreciate people who just want them to implement someone else's idea without the other person putting effort in. That is true for both good and bad ideas.

Its like going up to a tech person at a party and saying "i have a wonderful idea for an app"