There was a brief reference to this issue on this morning's BBC Breakfast Show, though I can't find anything on the topic on the BBC website. However, when I googled the idea 3 or 4 scholarly papers popped up - but most dating from the late-1990s - early 2000s, si it doesn't seem to be that new an idea.
However, the examples given seem to be physical, face2face, situations, and I wondered whether the principle is applicable to a virtual group membership such as we have here?
Any thoughts?