Im with Alison, FB is great for a laugh, following your interests [eg. Marc Marques], there are some great groups posting endless photos [eg. HQ owners, Vintage factory, SA motocross past and present] The options are endless. Firko might not want to friend a half forgotten dork, you choose you friends. Getting back in touch with some old school friends can be fun also.
I do agree those that treat it like a diary need to get a life but you can just lay shit on them the same way you do here.
You can message someone just like a email or text that is only seen by the person your messaging
Like anything, use it to your advantage, the world can be in your pocket.