On a recent entry in a now defunct blog, I received an angry comment that classical electrodynamics was exact, and that I should endorse this view. Every blogger receives comments from crackpots, but this one was particularly funny. Two issues were requested: I should denounce people that claim quantum effects and those that claim gravitational effects of electrodynamics - no joke. I never had been asked so clearly to refute the whole of modern physics, and to go back to the 19th century. I would like to point to a website explaining such views, but unfortunately, there is none.
Another harsh commenter claimed that supersymmetry cannot be refuted, because it is correct, though yet unconfirmed. A few days later, the LHC released data showing that the latest search for superparticles - gluinos in this case - was unsuccessful.
Some people will not be convinced by any data whatsoever.