Don't think this is even that controversial nowadays, but Flo Jo was quite clearly roided out of her mind in '88, and with every World Championship and Olympics that her abomination of a world record in both the 100m and 200m aren't disavowed they become more and more of an embarrassment to the sport.
Other world records are perhaps equally as obvious, but none hold the same cache and thus aren't as much of an embarrassment to the sport.
They need to go, and the sport needs to do its best to start over. Change my view.