First I'd proceed to edumacate the offender, then if it's painfully obvious the he/she is experienced enough to know better then I take out the knife and start cutting lines. After losing a few plugs, they won't be sticking around much longer.
If they pull out a gun or something, I duck and run for cover
Sometimes you can just keep on catching while they don't hook up at all, now that is funny.
J Habs, I hope your back is ok
