Very poor show. I like going fast as I can on the blue at Llandegla but it is strictly with the proviso that I only hammer it on sections with decent visibility and which are clear. It’s inevitable you’ll catch (or be caught) by others on any trails, a bit of awareness and consideration is all you need really.
It’s a good point by the OP that many riders may be on or beyond their limit/comfort zone so some allowance for the fact their attention is rightly focused on the trail rather than whether anyone is approaching from behind.
I prefer it when people do not stop, but move across at a convenient point to get past. When I am close to being caught I tend to move across and give a hand gesture to let the faster rider know that I’ve seen them and then give them as much room as possible to complete the pass. Less confident riders may not wish to try and go 2 abreast though.
A few words of encouragement/appreciation to faster or slower riders as you pass each other is entirely appropriate. Tell that kid they have a nice bike and deserve a malliot a pois!
Guess the etiquette is:
“Strava does not trump civility”