I hate that sort of mindless vandalism. You work (or play) hard to get something nice, and someone comes along and damages for no reason except that they don't have it.
Hope the damage financially isn't too steep.
As for Celtic. At least it wasn't ICT this time, so you're spared those headlines again.
I remember when I saw that vandalism starting in Holland ages ago. I was always fine with my bike being nicked (after all you nick one back..and the guy probably needed it more then you did...he's getting some use out of it) the midless vandalism I just don't get..why break someones things? it does you no good and costs someone else a lot of money. If someone steals your car atleast they are getting some use out of it...to me that's not as bad as just smashing it up.