Having invested in to some altcoins that are on these exchanges I wish that they'd delist their token, similarly I wish that coinmarketcap and other such sites would stop listing them and recognizing their prices. It only further promotes them and allows more people to fall in to the trap of thinking it is legitimate.
Believe it or not but CoinMarketCap mostly lists the supposed "good" players in the market. There are lots more bad players out there.
Well, I believe they might claim that but obviously they don't do the best of jobs at it. It's so clear with many exchanges that the volume isn't legit. I guess the issue is that CMC don't know if it's traders or the exchange behind it and they can't punish the exchange for the actions of some traders.