airpolice
What happened to the "nothing to hide, nothing to fear" principle?
As Tipsy has already pointed out, it is not a principle. It is a point of view.
I'd have no hesitation in turning it over to the CAA, Police Scotland or the AAIB in the event of a crash.
That's very easy to say.
It doesn't necessarily follow that you would actually do it regardless of circumstances.
Why so many aircrew seem to think that disclosure is a bad idea is beyond me.
I appreciate that you are a PPL so the issue doesn't directly affect you (nor me) but I can't help wonder if you've done any reading about the topic and associated issues in an attempt to understand (even if you ultimately disagree with) the views that are currently beyond your comprehension.
You might wish to go on to read about the criminalisation of air accidents. There are several excellent articles available on the internet.
Opinions differ but the consensus of informed opinion appears to be that the negatives of criminalisation far outweigh the perceived positives.