Yes, we are forever bewailing the poor impression caused by hire motorhomes whose occupants are entirely ignorant that there is any etiquette or indeed any social responsibility to be observed, or the effect their behaviour will have on Public perceptions of motorhomers. I found a similar situation to exist regarding hire boats on canals both in UK and Europe. They are completely ignorant in this respect, to a large degree because the Hire Companies provide them with no such information or guidance beyond the rudimentaries of how things work on the vans.
Perhaps it is time that groups such as ours should be writing to and putting pressure on hire companies concerning this. Certainly there would be some merit in such companies in turn being persuaded not only to provide better guidance but also to put pressure on or even support local authorities to provide proper facilities for motorhomes. After all in the absence of this their activities, and ours, can be expected to be increasing constrained as time goes by. Local authorities in rural France for example are by no means unaware of the value of hire boat visitors to their local economies...or indeed motorhomes...as is evidenced by the considerable improvements in facilities in France for both boats and motorhomes that have been in evidence in that country over the last two decades.