I agree with the drunks and idiots, but the idiots that bring their little kids gets my vote. The whole point of HHN is to be scared in a "safe" environment. As a parent, when I hear a child screaming in terror it totally ruins the illusion for me. My "Papa Bear" genes kick, lol!
As far as line jumpers go, I've taught my 18 year old son (6' 250lb) to stand shoulder to shoulder with me (6'3",never mind) in the lines. Good Luck Jumpers!