My clients (all current and most past) are on my FB. I share photos of meals and activities with their kids and they share parts of my business with their friends. For me, it's been tremendous for advertising. Even with the one client things went badly with in the end, still there was nothing posted online that was negative. My clients all know me and each other outside of daycare because of my efforts to promote those relationships which, I think, has helped build loyalty. They were even at my wedding this summer...including the clients who just started here a few months ago. Hell...those clients who just started a few months ago, decided to hire me based on my meals posted on the public FB page...I think FB is a great tool.