Agreed. your commodity hardware is gone, along with anything personal you left on it.
I wonder what the chances are of the thief actually booting up and browsing porn for a few hours? I doubt anyone steals a laptop without swapping/obliterating the hard drive and re-installing the OS. The better to re-sell it that way. On Craigslist.
I've had about $2500 worth of stuff stolen every year for the last few years. That includes electronics, 5 bikes, lawnmowers, tools, my truck..
Once its gone, its gone. If you don't mind paying another type of thief, buy insurance. Sometimes insurance is worth it.