Replying to Mammoth College Pass "Borrowing"

I'm trying to hit Mammoth this spring break, and can borrow a buddies pass. I look a lot like him, and the picture on the pass is complete crap, but how strict are they there? Im from Colorado and I've never had any problems there but I've heard from friends that they make you take your helmet off and answers questions to prove you're you.

Is this something that I should legitimately be concerned about or am I being a pussy?