I've been following the discussion on the CRT's Boaters Update about slowing down past moored craft. A bloke called Nick Roberts wrote a piece suggesting that we don't have this issue properly addressed. I think he expected a backlash to his suggestion that expecting everyone to pass your moored boat at tickover was unrealistic.
What seems to have happened is that almost all responders agreed with him, pointing out that if you choose to moor in the cut it's up to you to make sure your boat is properly and safely moored.
This was not to suggest that we shouldn't slow down but that anyone shouting abuse at a passing boat might like first to consider factors like how well they were moored to avoid movement, whether they were in a silly place, wind speed and direction, maintaining steerage way, etc.
From the point of view of hirers like me, this was music to my ancient ears. If you are only out for a week and you need to get back to base in time, there is little more frustrating than passing mile after mile of moored boats and being expected to move at tickover speed. Canals were made for boats to move, not moor!
We do of course slow down. But having read this discussion we will make our own decision on speed according to prevailing conditions.
The many comments on Boaters Update are well worth reading.