If you want to prevent IIMC in PPLs (and I am not sure they are the only ones at risk - Matthew Harding) then the best thing the pilot fraternity can do (ie those of us not in charge of the regulations) is to engage them.
The risk with the last few postings, whatever their validity, is that it will get the backs up the very people deemed to be vulnerable. Time and again I meet low hour PPLs who would love advice and wisdom but are terrified of being ridiculed by their seniors.
As a pretty poor amateur CPL I have modified my flying and recognised my limitations far more from a word of encouragement and support from my seniors than from people shouting how dangerous /studid / ideotic I am. The latter may have been right, but my natural instinct was always to go on the offensive and deny.