Reason 2. The lack of formal education and bad habit formed in school.
Many of the sports players just received sporadic primary and secondary mandatory school education before they
became professional players. In addition, they were usually the problematic students in school who didn’t bother to
learn useful and practical knowledge which would definitely offer them the norm of courtesy and polite behaviors
and mould them into civilized people. Instead, they were usually involved into verbal and physical violence and got
used to bullying other disadvantaged peers by virtue of their physical advantages.
Reason 3. The negative community influence in their childhood
Because most of the athletes were born in the impoverished social community filled with drugs and guns,
pornography and prostitutes, prejudice and persecution, violence and bully such as the famous New York Brooklyn
ghetto, where a lot of black children who were crazy about playing basketball later became rising stars in the NBA.
You can imagine the most critical period in the growing of a child which was spent among gangsters, hooligans, and
street battles and conflicts would have a lifelong negative impact on the kids when they later became professional
athletes and then brought these rooted bad behaviors and propensity to aggressiveness formed throughout their
childhood into the games by easily involved into fights and dirty talks against their opponents.