+1 slow riders, buzz their rear wheel!
I ride trail centres lots I never ask to pass unless its very open normally after the single track. I’m quick but always say – ‘keep your line dont stop, keep going’. More often than not they let me pass when they are comfortable I never expect them to let me pass.
Seen most things – best/worse bunch were a group looking at their head cam play back in the middle of the single track and ignoring two riders waiting for them to move. Clearly not beginers. As the third rider queeing to pass them I asked if they would mind awfully looking at the video at the single track. So its not all beginers slow or Turner riders 😉