As far as the negative effects of cocaine in the home, it's no longer just a problem for low income or one-parent families where the kids can often run riot due to not having the influence of a father figure to guide and chastise them when they fall out of line.
It seems that the problem of cocaine (in fact any street drug) is that it doesn't discriminate any class of person. I know of several families (as you probably do as well), that have both parents with great professions and are able to send their kids to public school and then off to University - and yet some of these well-heeled families produce offspring that become cocaine addicts. The parent can say, "where did we go wrong?" but that question is irrelevant. Society and pressures can cause just about anyone to fall from grace and become addicted to drugs.
To be fair though, I personally believe that it is worse for people like me that come from backgrounds where we had fuck all. Sometimes not even one parent! Kids that have been brought up in various children's homes and passed about like bad pennies.
I had a really good friend that was a step-father to his partner's son. That boy went without nothing and yet he turned out to be forever in bother with the law. I don't blame the boy to be fair, as my pal and his old lady were nearly always in the pub. The boy was allowed to stay out all hours and got involved with all sorts. Unfortunately, it led to him doing drugs and later had an accident which led to his tragic end of life.
Broken homes are without a doubt (in my opinion) a breeding ground for any kid to join a gang and take to using and/or selling cocaine to get the things that he/she could never afford. Drug dealing is considered, 'easy money' and let's face it – these kids don't get the same quality educational choices that those with money have. They see others that have all the things that they never had and look for easy ways to get them.
Without any doubt, those that come from broken homes are much more likely to get involved with cocaine and crime.
For more information about cocaine dependence