This is a metric like others, with its shortcomings but it has its use. I would be honestly delighted to see a competitive one about, say, volunteering in pediatric hospitals showing that there are no Jean-Marcs but rather plenty of Mohameds. The positive metrics, so to speak. One which is neutral (do not volunteering in the streets for instance whet you need to be "alike" in order to be accepted) but something truly showing integration. I do volunteer work and, sadly, do not see such trend.