[pas]

The better response to "typing is consent" is that, okay, you gave our address, now we're creating adverts with your house, making it look like you're selling it, soliciting offers in your name, and so on. Even though you just ordered a bumper sticker from us.

So, consent is given for a purpose, and you can't really do that with just an input box. Hence the fancy opt-in modal dialog wizard thingies, and the checkboxes at registration/payment time, and so on.