That sucks. i'll half to ride over there in the next few days and have a look for myself. on tuesday nights i spend half of my time watching the races and half of my time talking to that crowd that doesn't watch the racing. i have a hard time thinking those guys sitting out on the lawn would be stupid enough to do that. sure, they are hipsters but at the same time they seem to really respect cycling and don't seem like the type to vandalize the velodrome. my vote is for some people that don't hand out there regularly.
any word on how much the repairs will actually cost? we can charge a few bucks more per person for the bike swap and even have a donation box. might not cover it but it's a start.