^^ Major concerns, that's for sure!
I've been working on this "Privacy Policy", but I'm not much of a writer. I've been backing most of this with my "word" - and the fact that I've been running a car forum myself for the last 8 years, but we all know how good someones word is in a court of law! That being said ...
Right now, the "central database" is not public by any means. Information that you want to be displayed can be displayed on forums you want it displayed on. I have no intention of postings people information unless they want it to be posted. The privacy policy I have right now is essentially the same that you will see on any vBulletin forum.
As David points out, once your info / post is public on a forum, Google, Yahoo and all sorts of other misfit search engines / data collectors are going to get it.
Here's a prime example:
You posted on this thread, a few hours ago?
Type in "heatgain vhost" into google, and it's already been crawled.
Heatgain vhoist - Google Search
This isn't something we can stop easily, particularly if you want to show off your car(s). It's not for everyone, but I'm a huge showoff when it comes to the work that I put into my ride, as are a lot of people, so this is right up my alley.
Anyway, vHoist is still young and I'm working to appease everyone's interests!
Thanks for posting up! Info like this is imperative to me for making vHoist better.