Sounds arrogant or ignorant to me. You've got your solution so well figured out that you can't bother to talk to people about it and gauge their reaction? Sounds like a path to failure.
That's a little harsh. I've been using the term on LinkedIn because we haven't filed our paperwork for our S/C Corp yet. I'm perfectly willing to tell you what the general field we're working on but we're nowhere near ready to go live yet, or make promises about what we're going to ship.
I have other friends who are also working at "stealth" startups who don't want to tip their hands specifically because they're backed by relatively famous people in the space. If they start talking they're going to get a lot of unnecessary and unmerited attention just because of _who_ they are and not _what_ they're going to build.
Why exactly? Once you have convinced yourself and your team about the idea you are working on, it can reach a stage where talking to more people adds very little value. You can go back to people once you reach a stage in your development cycle that you are comfortable with.
I have other friends who are also working at "stealth" startups who don't want to tip their hands specifically because they're backed by relatively famous people in the space. If they start talking they're going to get a lot of unnecessary and unmerited attention just because of _who_ they are and not _what_ they're going to build.