How many people believe that there would be riots and chaos if god was proven not to exist?
i guess what you are asking is do people only behave themselves because they are so scared of going to hell however i think there are riots and chaos already even by people who profess to believe in (a) god/gods; look at all the religious wars and the chaos wreaked on iraq and afghanistan by a recent american president who claims to actually hear god talking to him, there are riots and all kinds of chaos in plenty of religious countries ; i think a lot of people who profess to believe in god also believe they will be forgiven by ‘their’ god because ‘right’ was on their side when they caused the ‘chaos’