> For example, it's reasonable for an account manager to email you as a customer and see how the product demo is going and ask if you need any help with something. If you don't care to hear from them, then let them know but that is not spam.

Remember that "Do Not Track" header? I kind of wish that had gone forward, but slightly differently--with something more like a "Don't Try To Interact With Me; Pretend I'm Not Here" header.

You know how, in most brick-and-mortar shops, it's a sales rep's obligation to make sure that every customer in the store has been asked "if they need anything" at least once? And how for a certain subset of the population, you often wish you could come into the store with a big flashing neon banner above your head saying "I'M JUST BROWSING THANKS" so they'd know in advance not to do it? ...except that, obviously, that would be horrible?

On the internet, it wouldn't have to be horrible at all.