On an open road empty of other 'fast' cyclists (and not in a group, yourselves) then YES, that's a BIG YES. Anything under 10' to a stranger is a pain. And could easily, depending on the lead rider, be intimidating. A defining element to creepy, beyond weird. Give them at least a water bottle hard squirt, or the bottle at their front wheel.
edit: Exception: Unless one's full tri-bike, skinsuit and booties have a team logo, because nobody is supposed to be able to draft 'pros in training'.


Another pain is kitted out folks coming slowly from behind, passing me, then in less than 20-30m they slow to a pace just under what I am steadily spinning.