Hearing protection is a good idea, just keep a couple of those little spongy ear plugs in your pocket and see if you can stand the noise from where you're sitting. I'd recommend the white ones to be more subtle, rather than the blaze orange.
I hadn't heard about people keying imports - to be safe, why not take a cab so that you can partake in the turkey leg tradition and not risk messing up the car on the drive home?
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