Casey, I voted "sometimes". In my experience I've had kilt-lifters who fall into one of two categories - friends masquerading as idiots or people who lift a few inches to get a reaction. Neither bother me until the idiots start to get too persistent. I'd get offended if someone lifted it in front of others, embarrassing or offending the observers.

Oh, and another category is drugged up dogs. They don't offend me because they know not what they do.