What the NSA - and governments around the world - are doing is simply indefensible. By overplaying their hand, there will be technical solutions that will be unpredictable and exceedingly more difficult to pierce that will put real criminals beyond law enforcements reach.
It's worth noting that it's illegal to insult the king in Thailand. Should Congress pass a law in the US that makes insulting a government official a crime, would you "not worry" about criminals anymore?