I was thinking about it for a long time. I haven't implemented it yet - as I can't find a selling point.

What eff is selling: bits of entropy. What my mother understands - nothing. What other users understand: I'm not anonymous, being anonymous is hard, let's go shopping.

So yes - from technical point of view I can identify you even better than that, but it doesn't solve any problem. Well, maybe except for advertising :)