there are crazy people everywhere. some have mental issues others have drug issues and other will have both. but what causing one or the other not really sure. But I agree with you should have a sign that at least say at this time we stop making pizza or food of any kind. plus it might be a good idea to like lock the door. Like I know where I live a gas station as a mcdonalds. they have one door for gas station and one for mcdonalds. mcdonalds one close their inside door at a certain and lock the door to clean and whatever.  Plus you are right you never know what they are carrying if they are carrying anything. I am sorry bad night at work.