I do think that there are positive influences in our society like these shows, and they will have their effect on some people.  But, I can't say that I think these shows will change the way people are.  Those who are closed minded and want to categorize people will keep doing what the do.  They will maybe see these shows once, think the shows are stupid, and watch something else.  Of course, people can change for the good, but it's unrealistic to think that every person is going to end up being a good person.