I don't think you're paranoid; actually, I follow what you write about privacy because as you say, you have an understanding of these technologies.
I don't, and it all seems very complicated to me, so I'd rather err om the side of caution.
But...I thought in a previous post you indicated that you liked social networking, perhaps I'm mistaken?
I think it was twitter?
Anyway, I consider your views to be conservative and well thought-out.