With one hand it would eliminate the opportunity to bait and switch, with the other it would extend a supply of users who weren't busy feasting on someone else'

With one hand it would eliminate the opportunity to bait and switch, with the other it would extend a supply of users who weren't busy feasting on someone else's bait. The real question is whether you could legislate and enforce such a law in a manner that couldn't be circumvented with simple accounting tricks.