Last winter, cycling along a dark old railway line a sustrans path, large group of teenagers sitting there chatting, as i approached, i asked could i get through, they all politely moved, one even said youre the first cyclist/walker to ask, all the others just rode through us, or tried treading on us.
The origianl incidents i posted about, one was in a park, and the other on a designated sustrans route,that was once a footpath along an old railway,now inhabited by old people with dogs who seem to be incontinent.