The thing is these people are not idea guys. Throwing a tagline is not an idea, an idea should include the whole plan, or at least a first version to be refined, augmented and improved.

Unfortunately, it seems like calling yourself "an idea guy" is a sign that you actually have no clue. I can't imagine a real idea guy calling himself like that :)

If you know how to code you're already so far ahead :) I remember talking to a guy who told me "and then we'll add the API", I asked "why an API? What is it gonna do?", his answer: "Everybody has an API, we need it if we're serious", he had no clue what an API even was.

In a way, it makes me sad. Most of these people I "interviewed" (for lack of better words) were working full time on their project (or so they claimed) but still had no clue what they were really trying to accomplish.