I have to respectfully disagree. I live in the greater Toronto Area with a population of 6+ million. While not the size of NYC it is not exactly small so I do not think population is the only factor.
the numbers are important, nyc is huge but the mafia members are high too thats coz the perception of the mafia is sure higher than other cities
most of normali citizens and gang members knows mafia only through movies only when they are in proximity they start fearing it very much, gang members who have links with mafia sure are happy to not be in contrast with them
fighting the mafia is not like fighting another street gangs they are not accostumed to the mafia-style i bet
