I like to re ride sections in Dalby as I see fit – I guess it's trailbuilders prerogative as it helps us to understand what needs to be improved and sorted out later on. Yes, I walk up against the flow of traffic, but as a rider I'm fully aware of where I am and where riders are going to be should I meet one. The majority of the time, I'm able to walk up as riders go past me at a fair clip.
To be honest though, I wouldn't intentionally go out to ride Dalby in reverse, and we do pick late evenings to ride opposite sections of trail, fully in the knowledge that we shouldn't meet too many riders.
As for walkers on the trail, I believe that they shouldn't be there, and if they get knocked they shouldn't have any reason to complain as the trails are fully waymarked indicating that there is a risk of cyclists coming along at a high speed. We build trails to be fun and engaging, with the odd drop and jump – try stopping when you leave a 5 foot drop only to see a walker come around the corner lower down and walk up towards you! It's happened to me and I would have been riding with care and attention over the drop and into the landing, so then try and work out who is at fault on that one.
This happened on the Black DOA downhill descent in Dalby which has been built with a specific riding style in mind. And it's signposted as such as well. I suppose a walker can be absolved of blame if the choose to ignore a no entry sign at the bottom of the descent.