Protests on the M25 are not infrequent. Our eldest son missed a flight because some fools were dangling from a bridge near Heathrow, something to do with rights for fathers I think. The average man on the motorway remembers the inconvenience caused but not the message. They cost the highway services unnecessary expense and take them off other important duties.
To think that London, or anywhere else for that matter, does not belong to any one demographic