The 11th Threat...
The biggest threat to the golden age of the internet is "the stupid." It's already permeating every corner of the web, and I'm afraid it can't be stopped.
You used to need a solid background in at very least HTML programming to post anything on the web. The majority of information retrieved in a young Google search was uploaded and hosted by a college grad-level user.
Search for information on changing brake shoes on a 1996 Mazda Protege, and you'd get expert advice from a professional who was excited about this brave new world, and shared his expertise concisely and thoroughly.
Now try it. You get page after page, site after site, of morons all bemoaning how hard it is to change brakes on their Mustang. Nobody asked that, but they feel compelled to commiserate, and although they've never owned a Mazda, why, here's a great slide show for some irrelevant model year radiator job. Anyone with a hotheaded opinion can push it into the Google with a smart phone while choking down a McRib. It's a tsunami, and it can't be stopped.
The geniuses who used to be the bell curve are now the fringe. The hoards of stupid have crashed the gate, and are hungry for bile-infused diatribes. Well-intended bad information is driving our everyday lives, and the coming generation will have infinite knowledge at their fingertips with only a gorilla-glass-thick depth of understanding with which to respond.
God have mercy on us all.