Do you unbuckle your boots?

Was out today and I noticed someone on the lift had their boots unbuckled and when they got off at the top clamped them down again. Made me wonder, when I'm taking a run hard, I like 'em buckled tight, but man it hurts. So why not unbuckle when done and move them around depending on what you are going after? This seems revolutionary to me, but guessing this may be common practice?