>1. If you buy a used old console game, you don't support the distribution of
the DRM techniques, because the producer of the game does not benefit from
this transaction
I think this is not strictly true as your money certainly flows towards the
DRM maker. There just is a few hands in between. Now the guy you're buying
the game from gets funds from you and if he bought a game with DRM in the
past he's likely to do so again.
Of course, this is not nearly as bad as buying directly from the original DRM
maker. But on the other hand it doesn't absolve us from responsibility wholly
either.