[rjf1990]

Sure, there are a lot of companies that initially sounded like bad ideas. But there are ideas that aren't just bad; they aren't thought through.

I hear dozens of people tell me about an idea and it's apparent that there's no chance they will succeed with this. A lot of time they're trying to enter a market they know nothing about (as this article described), for example finance students trying to do a clean-tech startup. Other times, it's the market opportunity. These ideas that suck so badly are just people who haven't been around startups to realize how to think about them. They're the kind of people who I wonder if they've ever read The Lean Startup, PG's blog, or any of the commonly-accepted startup wisdom.