cancel trick or treating?

My kids are making me truly crazy. I have now pulled out the big guns: I am currently holding Trick-or-Treating over their heads. If they don't shape up (and this is not an empty threat here) then Halloween is cancelled. I know they are just kids but this has been going on for weeks and weeks. The bickering, fighting, rudeness, short attitudes, hateful, and hurtful (both emotionally and physically) to each other will stop. I do not know what has happened to my children! I want the real ones back. :(