Yep, what a winning plan... the wireless cos don't want to be told to give anything away for free. Everyone else doesn't want inefficient and buggy porn filters on their connection (See the earlier australian example where prudes got the gov't to spend big money on filtering software, *assuring* them there'd be at least 1 million interested, when the actual figure proved to be under 20,000.)
And the FCC guys are right as well -- this would lead to plenty of congestion. As it is, the cell cos charge a lot for data, and still have problems keeping enough capacity to keep up with demand (not just wireless spectrum, but backhaul as well..) As long as everyone weren't turned off by the disgusting lack of porn on the new spectrum, the cell co would probably have to use almost the whole 25mhz if they wanted to avoid unreasonable slowdowns. No wonder there aren't any takers.