I agree that Pprune is spoiled by poor discipline. Some threads/topics contain useful information, well-argued on all sides with (almost) no mud-slinging - like the current one on approach speeds which has already sharpened my attitude to 160kt to 4. Sadly, many others degenerate to be of little practical use.
If there were a way of weeding out the degeneration then I don't think there would be a need for a 'SuperPprune'. How that could be done is quite a different and difficult matter. More muscular intervention by moderators perhaps - which would require more time/money to be invested by them.
I've returned to reading Pprune after several years' boycotting. Danny has shamed me into buying a PT and I'm looking in to it at the moment. Perhaps this could be the way forward for Pprune?