I mostly drag the spur up the trunk, and step down. No stomping. If I need to set it right, in funky wood, I'll look, and set it in place. This drag gives me subconscious information about what I'm doing. Its harder to spike your rope, if you smoothly lift your foot, slightly dragging, and step down, keeping your rope on top of your foot, going to the outside.
Stomp it in, reverse-stomp out, whatever that is. I do know that is unnecessary wear and tear.
When I'm climbing in pole spurs, particularly bigleaf maples, I know that I occasionally will start to slide down the bark/ wood interface with a long slice, if I haven't set the spur a bit before standing up tall for a reach...no big deal, and I'll take the trade-off for greater stability in small wood, and less torquing on my joints. It probably exacerbated by me not looking to see if they are 'barking-up" and need a little clean-off.