I think the point is quite simple in that we all share the waterways and BW run them. BW have set the guidelines for the use of their waterways. These guidelines are quite clear in that we should all close lock gates behind us, which the majority of boaters do. I am only too aware that guidelines that are ignored soon become rules which I am sure nobody wants.
If we all adhere to the guidelines there can be no argument or bad feeling. It may be inconvenient for single handers but tough. If they don't like it find some crew.