From what we can gather it was just a random keying, although it seems a coincidence that all of the cars were british, and the line of cars stopped when the next nationality of car came along, then started again with the Cobra on the corner.....
The alfa is Doris's, the Porker is Paul Zarse's - the guy with the Merc wasn't with us, but the message on his windscreen made both the thoughts of everyone on our camp, and his, abudantly clear.....
"to the **** who keyed 10 cars last night, we hope you f****** die"
If the aim was to dampen spirits though, it didn't work....we were partying long into the night, every night...we saw some cars too.....