Nice observation frenchman...
I am reading them... but certainly not going to base some form of safety education/intervention on what is posted on here, as strim is hoping to do.... "Well... from what I've read on pprune...".
This isn't the place to address the issues "plaguing Parafields skies".
Stick to the ATSB report, and do something a little more beneficial such as talking to FTA, other flying schools at PF, CASA etc. or whoever will actually make a change in how things are.
Surely you're not denying the importance of an informal network amongst professionals (or, in this case, a mix of pro's and students)? Rubbishing them is counter-productive, often erroneous and pilots being the quick-filtering, cut-the-bull**** collators of information they are, if there wasn't a need for it, likely it wouldn't exist. The same sorts of networks exist amongst regulation-heavy working environments like intelligence, law enforcement, emergency services, etc. Official investigations take time, as do flow-on policy changes (a coroner's investigation, even for a fairly clear-cut death, will still take around 2 years for example). People will talk and will not be in full possession of the facts, this is just reality. Saying "STFU n00b, wait for the official report" is pissing in the wind.
Even if the sum total of the gossip is 'make sure you do a decent lookout', the probability of another incident is lessened and the more we have persons close to the action in here commenting, the better off we'll all be. If everyone did it right, there'd be no need to re-iterate it, yeah? You're right that no-one should treat this site as their only source of safety info. Can't think of many people who would do that, though. What you're advocating (chat to FTA, etc.), people will likely do anyway. That informs the individual. Posting stuff on here helps with promulgating it.