"Mmm... hm." Bella closes her eyes and tilts her head back. "That doesn't mean there's no useful tweaking to be done. I might want to buy something a telemarketer is selling. I don't know whether I do or not until I listen to the sales pitch. But on average, listening to telemarketers is a waste of time, so our house number is on the do-not-call list. Meanwhile, I haven't asked my mom to stop sending me email forwards that she gets from her floaty silly friends, because while plenty of those are also wastes of time, a fair number of them are cute or interesting, enough that it's usually an okay bet to spend the time opening the message. I bet there are ways you could make it harder - or easier, for that matter - to hurt you in particular ways, that would make things better overall. There's no reason to think that the exact amount currently happening is exactly right."