Interesting discussion of Trials etiquette. I came from Mtn Bike racing, where you are on the course with many categories at the same time. Allowing passing is necessary, but not required, and most courses include plenty of wide spots. Trials is not a competitive loop, yet it seems that it would be rude to block a faster rider, simply on the basis that for those of us who can and like to go fast, it screws with our rhythm. In our club there are many desert racers and fast riders, also guys who ride the loop in first. A balance must be found.
ATGATT: When you fall off your motorcycle, you will be wearing what you were when you got on your motorcycle. Dress accordingly.