I'm all for not being a hair snob, but that, for me, is not the same as riding around with a bullhorn telling chicks about LHCF.
The problem is that unsolicited advice of any kind is often not well received. I think MOST women would take offense to some random woman walking up to her and saying, "Hey, you should join this hair care site." Almost without fail, it will be assumed that that's an indirect insult on the state of her hair. I know because I've tried it.
Apart from that, I think many ladies here will tell you that too often when people ask for "advice" they want a quick fix...some magic potion that will make for long, thick, healthy hair. The problem is that A) for many of us, there isn't one thing that's making our hair what it is today; it's a combination of techniques and products and most people don't care to be bothered with the minutia of some of our regimens and B) they'll listen but not actually apply the advice. That can get old because people want what they see, but they don't what to do what that person did to get it.
If I can detect sincere interest, I'll throw a few basic things out there to test their responsiveness (deep conditioning, cleansing weekly, etc) and then I may get into more detailed aspects of my regimen. I almost feel as if I'd be misleading someone by not telling them all of the little tricks and secrets I use. Besides that, too often women with unhealthy hair are doing something that they *know* to be unhealthy but don't want to give up.
And for some of us who frequent other parts of the board, LHCF is our little secret, and we like it that way.