Hi, Malek, I don't think it would be a problem for us to turn pinging on.  I was assuming the email "follow" subscriptions would be enough, but they backfired :( .  If you could take a couple minutes Friday and improve my understanding of how a poster and a reader would relate to pinging, there is probably no obstacle to turning it on.  (We do have some server resource-consumption issues we have to watch, though.)