Let's agree that each plan has equal administrative overhead costs, and that for each plan this cost is $10 (actual admin cost should be nowhere near that, but hey, this AT&T we're talking about). So, that leaves $5 for 200MB of data, and $15 for 2GB of data. So, 1/3 the cost for only 1/10 the data? OP's point still stands. They're screwing you on the high(er) end plans, but they're screwing you even worse on the low end.

I wasn't discounting it, just saying it's nothing new, not to mention it's nowhere near novel. Visible light communication was pioneered in the 1880s! http://bemri.org/visible-light-communication.html

Old modems with external LEDs (as well as other network equipment with TX/RX LEDs) were susceptible to data leakage just by reading the LED modulations. This is just faster. http://www.alge.no/ebooks/Optical_tempest.pdf

even worse, if the controller is, in fact, a bitch.

Even at full light speed, something as relatively close as the moon is over 2.5 seconds for minimum RTT.

the days bills come.

Hell, I just bought a *color* networked LED printer (similar to laser) for $140 shipped to my door, and I've used some of those sub-$100 HP lasers. For most home desktop use, they're fine, and you can't beat the cost per page on a laser/LED...the one I just bought is in the $.03-.04 per page range for color.