I may not really have a place to say anything in this. But when it starts splintering so much, quite frankly I don't know what they all mean. So I politely ask and someone explains. But if you have to take ten minutes explaining the exact splinter group, what good was the label? We use labels as a sort of short-hand when we want to refer to something or someone succinctly. If you have to stop and explain the label all the time you lose that.
The only other reason for labeling a group is to segregate them in some way. Separating a group in this way can lead to discrimination against the group. And intolerance of those that don't fit into the group. IMHO nothing good comes from this.