Jason has flown for me in the past, and I would welcome him again: he has no problems that I know of! Anonymous slagging of him has no credibility here.
N2, CASA are quite discrete in their treatment of complaints, and I would be more than surprised if you (or any of us) were to be made aware of the outcome of any complaints, short of a prosecution through the courts. There are many other outcomes which would never be made public, whether complaints are proven or not.