Slashdot comments dominated by software guys. I can tell you, with the *right* (semi-expensive ~ 10k) equipment, the hardware part of this is fairly trivial. (lets say 1h)
Police and secret services use IMSI catchers and trojan-based attacks on a large scale, so why should they not set up a DVB base station for an attack on a specific target (nevertheless infecting 1 Mio of devices in the target area).
Large-scale phishing attacks could get *much* easier. Imagine a News channel which broadcasts a warning about credit card fraud with a contact number to call.
Imagine a finance stock market TV which broadcasts a sudden warning about a stock on which you placed your bets before.
Criminal easily spend 10000s of $ for bullet-proof hosting, so buying DVB Test devices and applications from Agilent could even reduce their costs. If you earn enoung money with it, it pays off.
Everything which worked via spam now can be done without any chance of blocking it. I am fascinated by the idea that a semi-modern device would accept anything withou authentication. (oh, i forgot, typing in a verification number would be *so inconvenient*, so it would hinder shoveling advertisements up into everybody's ass).