My only concern about the wave (and its not probable) is if I were asked to empty my pockets by an LEO, In a stressful situation I may forget and let it open creating the wrong impression in a highly caffinated armed, but otherwise probably freindly individual.
Yeah it's definately not very probable that you will accidentally open a waved knife. Since you have to consciously make it hang up on the top corner of your pocket. BUT If for some reason you did manage to let it hang up, you could always yelp out: "Oopsies! Didn't mean to do that Officer! That was an accident! Please don't pop a cap in my ass!". :thumbup: