Yes, the vast majority of these people are arrested for very good reason and accept a deal to reduce the odds of worse punishment with a jury trial.
Criminals all over the country are not going to unite to "crash the justice system". They couldn't care less about the system and only make these deals to save their own hides from a longer spell in jail/prison.
Absurd. If ObamaCare is deemed 'Constitutional', this is a logical movement by a group of 'criminals' to fight back against the State. Anyone can be deemed a criminal by this organization called govt.