This isn't just the internet. I've used this at work several times to break stalemates. I've come into many stalled projects where people are arguing over trivial details or blue skying on requirements. 1-2 hours and a 7 page design doc later I'll have everyone review what I know is an 80% answer. Pretty much every time they'll all start attacking my design, pointing out minor issues and then I have them. They've agreed to my overall design and are into details.

Same if someone is calling out all of the general problems with solving a problem but not providing answers where you can't get them to bite.