GW – I do next to no trail centre riding. The majority of what I ride is indeed natural Singletrack or walkers paths in the Highlands of Scotland. I fully accept that I do cause erosion, I fully accept that I probably cause more erosion than an individual walker.
What I object to is people using these built paths and causing excessive erosion. This gives mountain bikers a bad name and I would hate to see any of the large landowners, parks and trusts take a negative stance on mountainbikers due to people damaging made paths unnecessarily.
By all means ride these paths, but do it in a responsible manner.