I've never heard of this type of objection before - it seems strange to me. Being lucky enough to live in a popular and beautiful part of the world (South Downs National Park) we locals often complain amongst ourselves about the volume of visitors but not about cars bearing racing/rallying liveries - even if travelling in convoy. We have so much traffic here that you wouldn't be able to distinguish a convoy from the normal traffic flow on a busy weekend. I cant see what difference there is between a car in racing/rally livery and a van or truck with it's company name on the side ! It's a funny old world isnt it!