I would totally follow you. I follow all artists on DA on FB too (if they have one)
It's just nice to see some art on your homepage. It's your decision if you wish to make an FB page but I totally would. Besides, you've got quite recognizable and unique art, if anybody would try to steal it it would easily be recognized as yours. You can also put a watermark on your artworks (like a link that refers to your DA profile?)
And I didn't konw abou that FB rule, creepy... :s
I'd follow you on all those sites you mentioned but I haven't got an account on any of those
I think you'd also gain a lot of popularity by making a Facebook page since (almost) everybody has one nowadays. Facebook is awesome for sharing art or just day-to-day scribbles.
But whatever, if you don't feel comfortable, then don't.
However, if you decide you're going to create a page (which I support!) it would be cool to see pre-sketches and just random pictures. It's nice to see a bit more personal stuff. Maybe unfinished works or old works. I love seeing that kind of stuff and I think others do too.