I'm guessing a few of my would-be investors probably read this site. I'd prefer to remain anonymous.
If so -- why? I would expect that the chance of investment deal would go up for these reasons:
1) Open public discussion makes you more known, and therefore investment outcome is a little bit more predictable.
2) Public discussion promotes your future business.
3) Open public discussion indicates you are not embarrassed to connect your name to your business.