Ah, but there is drafting and then there is personal space..... you can be not really drafting, but still in somones personal space. If the rider ahead is nervous then 10 feet may not be enough for them.

Just if you are on a busy MUT (multi use trail) do have some expectations that you will have someone following you at times.... I know that I always WAIT until there is a safe place with good visibility to pass, and that does mean that I end up behind people at times.