MikeJ.
Not seen the occurence report either, but if PPLs pre-flight correctly and obtain best available TAFs etc, then they have fulfilled their legal (and common sense) obligations. If on arrival the Wx is different then thats why we're here. When its busy then sure, it can be a pain in the A@#e for ATC, as one lost or stuck in IMC PPL is very workload intensive. But its a very important part of our job.
As for the worry of being reported, then if the PPL has fulfilled his obligations then he/she has nothing to fear from being reported. Reporting of these occurences can obviously be a positive thing as it may help to highlight the reasons behind the incident and allow others to learn from the, sometimes minor, oversights made by all.
However, PPLs who rely on the TV AM Wx forecast need shooting!!
Regards ADIS