Just do your work, and don't fret over what you don't or can't see. I have attended many drum circles where people are playing djembes, bodhrans, doumbeks, native American drums, all together. I'm not saying there's anything wrong with this. I often enjoy this kind of circle. But, it has very little in common with traditional African drumming.
Some people seem to use drum circles as an excuse to smoke dope or flex their egos.
This has nothing to do with African drumming, which stresses tradition, discipline, respect for the instrument, working within a group, etc. I guess it is that if people are interested in traditional African drumming, it is up to them to join the traditional African drumming community, not expect it to come to them. That community was there long before the first white discovered that djembes are cool. It's hard to comment in a vacuum. It's on the EurAms to pick up on.