The proper way is to cut the valve steam with diagonals. That's sufficient. If you're charged with the value of the damage a valve stem cost 2 bucks a slashed or ice picked tire could start at 200.
You can't beat free legal advice!
25 posted on 07/20/2017 5:03:25 AM PDT by Vlad The Inhaler
(We were Trumpin' before Trumpin' was cool.....)