If it was actual theft then why did they pass a new law for it? I'm presuming here, but hasn't the US got a law that already covers theft? Just saying like. If you've ever had to start proceedings for copyright infringement you'll see how different (and more expensive) it is than straight forward theft.
I like your guess at how much you 'lost' from those downloads though. I mean, if you had 4000 downloads from your site and expect a 1% conversion rate that would be $800 yes? But we're talking pirates here and there's been some discussion on what proportion of folks who pirate a game would have bought it if it wasn't so easy to get hold of them. By your reckoning it's 100%?
Not sure why people get so aggressive about this. I've not seen anyone say they support piracy, just differing opinions on how much value they put on their own time. Everyone has the right to an opinion - regardless if they've released games or not.