See this is when my plan of action comes in to play. No it's so not legal, and could cause serious harm, but meh. At least you got to class in a timely manner.
You get a cattle prod, or a nice sharp stick. Then start to JAB people when they don't move. With the cattle prod, yes they will probably fall over and foam at the mouth, BUT you just hide it behind your back and look around like WTF?! All surprised and innocent like, no one will ever suspect you.
Yes I've had this plan for years, used to tell my friends that. When I actually HAD a locker, some moron would always take for ever getting crap out of theirs, wasting my time. Or they would make out with who ever they were dating like NEXT to my locker. Why on earth would I want to see that?! SO I contemplated grabbing a stick while I walked to school, so I could jab people when they wouldn't move.