The same argument could be made for banning Tor. I disagree, though, as these technologies can be and are used for good/normal things. Not everyone is running guns, evading taxes or selling drugs. In fact, most people aren't.

They were attacked, but about two years ago it was an attack along the lines of 'Pfft, how can random mathematical equation busy work determine value?', which was a lot more reasonable. Current articles go for the emotional stuff.