Classes are only in your own head. (Just to clarify, human beings like to classify things, but naturally things just exits, they are not classified). Some people like to box everything, keep everything separate, some other people like to make wonderful mix of everything, we all are different and perceive world differently, most of the time our perception of the world is pretty much off from reality. Scientifically it is much better to have all sort of different people with different skills and world views in same box than have only welders in making of wooden ship for example. Growth of new modders is much faster in environment where everyone are exposed to everything, information and skill exchange is far greater, stimulation for creating of new is higher. Studying history of humans from past 4000 years or so helps a lot to realize how bad it is to separate people vs mixing people, you just get more creation with different people in same spacetime, humans still are trying to learn this, it will take a long time, but at least people are trying. Forum communities are bit like miniature worlds, partly same challenges as there has been in human history. One big challenge is this classifying of people to better and lesser, should learn away from that to really get things working, but it does require some work.