Last Friday night my wife and I were hanging out with some friends in downtown Portland. She didn't feel like riding home that night, so I locked her bike to a rack on a well-lit, well-traveled street, while she got a ride home from a friend. I removed the front wheel and locked it and the rear wheel through the rear triangle to the rack, figuring that this would keep the bike safe overnight. Wrong...
The next morning we walked from our house to retrieve the bike and run some errands. Rounding the corner, we saw that the bike was where we had left it. But some inconsiderate f**k had jumped the curb in their car and smashed the frame and wheels!!! Apparently their bumper caught the rear wheel and levered the bike completely around the rack, completely mangling the rear wheel, bending the rear triangle and front wheel due to the way I had locked it. The damage couldn't have been inflicted by anything other than a car--the metal was gouged by impact in only one spot of the wheel; only a powerful object could have done so much damage in one blow. Also, I found a fragment of the perp's turn signal lens under the bike. We asked around at some of the local businesses, but nobody saw anything. The bike messengers at Capt. Ank's swore revenge if we found the fool who did it.
We're a carfree family at the moment, so my wife used her bike every single day for basic transportation. I built it up myself from a cheap garage sale bike, so it had some sentimental value for me even though I didn't ride it. Insurance will cover the loss, but it's still a rude awakening to have something so important be wantonly destroyed by a stranger.

My question, BF members, is this:

Should I find the person who did this, unlikely though it is, what would the appropriate retribution be? I'd like to exact equivalent revenge for taking away my wife's basic transportation and cherished alloy steed, even if only in fantasy.

Ideas?