said by thisIsJunk :Does unsolicited inbound traffic get metered and count against caps? What if someone targeted you with something like a DDOS would they be able to use up your allotted bandwidth? What about protocol overhead?
Yes to all, and more. Unwanted ads. Unwanted malware. Massive patches to software that was defective and buggy. Everything, all traffic, whether you want it or not, or solicit it or not, will be on your dime. You'll pay for everything.
However, this will also make it very easy to prove damages. Since you pay for the unwanted traffic, you have an open and shut case in court about incurring losses. It's quite feasible you could sue apps makers, advertisers, even ISP's because of the "damages" you incur from unwanted traffic.