they are scared. and should be with negative pricing exchange 'policy' and rule. it's not worth even any legal lawsuit for the FCM to deal with the exchange boys.
just don't deal with them. avoid a dealer if they are bad. there isn't a lot of competition for futures traders now. only one exhange in the country. so it's anti-capitalism with no 'competition'
the exchanges used to be owned by members..that is what happened..
now the traders. brokers are the 'customers' of the exchange, the exhange is now a 'business'
in japan, the exchange is 'non-profit' organization and same with the NYSE before. so there was no pressure to make profits.