If anything, I think the Internet has made it easier to expose bad science. People like Andrew Gellman and websites like pubpeer have had a huge impact on the practice of the social sciences (psychology especially) just using blogs. In the past he would have been ignored. Journals and authors do their best to ignore, dismiss, and discredit him now. Having a direct voice to the public is what saves him.
That would be strange and misguided because I didn't talk about a consensus, I was talking about a mechanism for consensus. And consensus has existed many times on many issues now, and then.