I do that too. I find it absurd, because no matter how cool the founders claim to be, or how much they promise not to spam my friends or write all over my fb page, they will, and they will do so without the slightest understanding of why I might not want it.
So yeah, I get you.
To the "lets be amigos" people: stop it please. I might think you had a good idea, had you not followed a path so closely associated with the scum of the internet.