Although I don’t unnecessarily skid on my trails, there are definitely times when it happens from carrying excess speed into a corner. I think thats pretty different than using skidding as a technique to corner. As far as the signage is concerned , I don’t think its necessarily a bad thing, but I doubt it will impact riders normal riding style much. I would like to hear feedback on this from someone at the Angel Fire Bike Park trail crew. Although at a bike park, where trail crews continually are up keeping trails it’s probably the most acceptable place to skid, I am guessing it has everything to do with trail design and composition of the trail. My question is, does skidding on trails contribute to braking bumps?