It is very simple. I have one of my degrees in sociology. Although many people hate "stereotyping" (negative generalization) or grouping people into broad general catagories, it happens. People create catagories to help them cope and deal with all of the activity and chaos around them. It simplifies things for the mind. Oh, yes another of my degrees is in Psychology...
I can honestly say I hate the ghetto movement. What do I mean by that? Low income, teenage, urban trailer trash of our inner cities. However, it has spread beyond the urban environment into our smaller rural communities as well. It has become a mentallity, a cool thing to be...
There are key characteristics that make these groups, well groups. Either you like them, support them, hate them, reject them, or tolerate them, etc. Yes, you can like some things and dislike other things as a whole. However, there are some groups that I can say that I completely disagree with what they stand for, what they do, and how they do it.
One example you can look at is the carebear community that has been brutilized by LoD. Do you think they care about you as an individual? No, you are lumped in as a greifer, under-aged brat that has control issues and no social life...
I'm not saying it's right or wrong Stretch. It just happens and it will NEVER change.