As long as we have expensive stuff, there will be someone to steal it no matter what punishment we threaten people with. Years ago I just came to the conclusion that, over the course of my life, I'll get ripped off a few times. So, I take reasonable precautions (not going to leave my key in my bike) and then don't worry about it.
When I gotten ripped, report it to the cops, hope for the best, and move on.
I know (hope) there is a little humour in the hang-them-cut-off-their-hands-then-shoot-them lines, but, well... it's just a motorcycle and they'll keep making more of them.
Note that I love my bike (a nicely accessorized, carefully taken care of Ducati) as much as the next guy on this list.