Originally Posted by
WhyFi
No, he was asking specifically about safety -
The etiquette you mention is tied to safety, so it seems fair game, dunnit?
The full context is--OP wants to draft and reap the aero benefits, but is unsure of how close is too close. Aero benefits do not matter if OP is violating this:
Don't draft people uninvited and this won't be an issue.
as Rubik said above. With that out of the way, we can discuss safety as it relates to rider skill, and the relationship between draft distance and benefit.