I'd like tol add my 2-cents worth.
I think there are rude and entitled posters across the board. The differences I see on the brands i authenticate vs. the brands you've been discussing (
Prada, Chanel) is in the mod/admin for that subforum. If the subforum has a mod who lets the authenticators take the lead and set the tone, everyone is a lot happier.
Some mods (who don't authenticate) allow their authenticators to set the pace so to speak. They allow the authenicators to apply their own guidelines, the authenticators can comment on seller histories, feedback, selling practices, etc.
With that freedom to post semi-OT discussions, the subforum is a lot friendlier, easy going and educational but rarely leads to the frustration and departure of authenticators as I've personally witnessed on other subforums.
When a mod isn't an authenticator, it's hard for them to understand and see things through the eyes of an authenticator. They view it as "rude" when an authenticator calls out a non-expert on an inaccurate opinion. They don't get why we ask for what we need to see and aren't fully aware of the amount of money involved (both to buyers and sellers), damages to reputations and the damage misinformation can cause when allowed to be posted unabated.
It comes as no surprise to non-authenticators that NOT anyone can step in an provide good accurate information. Authenticators have years of experience buying, selling, studying, fondling, carrying their items and they have electronic libraries with thousands of images. They have word documents up the wazoo with notes on exceptions to rules, date codes, factory codes, years that certain items were made, fonts, etc.
One can not just log in to TPF and start as an authenticator and give accurate information.
If TPF admin want to keep their knowledgeable experts and continue to have a reputation that members can get accurate information re authenticity, those unpaid volunteers need to be appreciated for the time and expertise they provide.