Apart from a short slabby section near the base, Beerwah is a fairly easy climb. It's pretty unusual for anyone to get in trouble there, but choose the wrong route on the descent and you can quickly find yourself in an untenable position.
Inexperienced climbers much more likely to get in trouble on Tibrogargan.
Coonowrin was closed in 1999 for "safety reasons". That doesn't seem to deter serious climbers. It played a big part in Australia's early climbing history.