Really bugs me too. Think more races should be up on it and prepared to penalize people for little, but how would it work in practice? Ironman type events may be more able to do so if they already have people on the course looking for drafting.
Highest weekly mileage of the year (21.5) brings me to 197.5 for 2015. Was hoping to hit 200 miles but will do that this week. My excuse was I got convinced to go dancing on Friday night. Saturday morning, legs felt worse than after a long run!