brent245, first off let me say,"I feel your pain." I hate it when somebody messes with any of my cars. It's a real sign of a true coward and who doesn't have the gut's to come out in the open and stand up to anyone.
As for any dents that may have been caused by the creeps, they can usually be taken care of by a paintless dent removal company. It's not cheap, but it's worth it not to have any paint work done to your car unless it's absolutely necessary. Check with your insurance co. but I don't believe vandalism will make your rates go up. Hope you don't have too high of a deductible. Good Luck