As an aside to your post, Guy, I don’t log off of forums anymore and haven’t seen any side-effects from doing that other than I don’t have to log on to forums anymore.
I do not know but I have noticed that a little while ago that I no longer had to log on. I cannot even find anywhere to log off. Something must have changed.
I use Firefox Multi Account Containers for all the really nasty stuff like LinkedIn which tracks you all over the web (and YouTube, everything from Meta etc.) so that I’m only logged in and cookied in that specific container.
Also helps a lot if you have multiple accounts, you can just have different containers signed in as different IDs.