Wrong People (rong pee-PHUL) (noun) - Those who would carry weapons, grudges, ill-intentions or illegal substances into a venue or show where they are not wanted. Can be exceedingly difficult to identify unless they choose to self-identify by overt anti-social behavior, identifying articles of clothing or body modification (certain images displayed as body art). Race, ethnicity, nationality or religious affiliations do not predispose any individual to this definition.Again, unless you can somehow identify who the 'wrong people' are without being prejudice or offensive, then you will have legal issues to deal with - and these alone will run most places out of business.
This is your opinion. Successful owners do not usually make irrational, not thought out changes.