Perhap Banksia corner could be a good candidade for some DIY geotech work! Been ages since ive been on it, just remember the big hollow door at the top.
Pipers was one of my first leads years ago - dont think I climbed for the rest of the weekend after it......
Wendy - yes the rock isnt Arraps, and I'm not talking about taking off anything that might never go/would be too small to really be a concern.
But the reality is that there are a number of - clearly widely recognised - time bombs that have gone and will continue to go, and may one day squish an unfortunate belayer. A helmet wont do anything. Lashing the belayer might, but nobody will bother, considering that they are at a popular crag on a route that may very well have stars, or the very least a lot of prior ascents.
M9 - Its is more or less a single pitch crag. Im not talking about trundling at the bungles. Dangerous blocks dont belong on a single pitch crag.
So what is the solution - try and avoid them? Like i said - Im not stranger to crap rock, but have had probably half a dozen situations where luck/some awareness/good descisions - but mainly luck - have avoided huge injury to myself or a friend.