Anonymity works the other way too. I've flown with people who'd have more acronyms to verify then I could ever remember. I know a few fast jet jocks turned tin tube flyers who'd rather NOT have to declare the full extent of their knowledge, and would just list a PPL.
There's also several retired flyboys who've forgotten more than some of us will ever know, their input should be equally welcome even though they now don't have the paper to prove it.
Ultimately it comes down to that fact that this is a public forum, and as such you've got to take each post at face value.
TPP