...or rather, on what happens when one doesn't have peer review. A representative sentence:

It has been previously demonstrated by the present author that the process of converting a decimal number into a binary number can be represented as a form of the 0-1-Knapsack problem, and therefore is NP-Complete.

If we can't reject obviously-bad papers from the arxiv, why can't we at least have a special "solutions of P=NP" hell ghetto category to segregate them into?