You forgot helping charities, that's apparently another evil that needs to be stopped.
I never really got this analogy, car manufacturers still get money as they sell replacement parts for those older cars. And it's not like that 3 year old car you're trading in is still being sold new. It's like complaining that someone is trading in a copy of Halo 1 to buy a copy of Halo 3, but they're actually complaining about people selling or trading in Halo 3 when Halo 3 is still a new release. I don't think developers deserve a cut on used games but this example just doesn't work as a comparison. Used books are a better example, but I don't hear many people complaining about used book stores or libraries either.
I read through the original blog post, I found it funny that he claimed to always buy new games off Amazon so he doesn't have to pay tax on them. Is paying developers somehow better than paying taxes? I thought taxes helped pay for infrastructure and public services, it seems like it would be better to buy a used copy locally and pay taxes than buy a new copy online without paying taxes.