Some of those coins are just shitcoins.
Not some of those but most of the coins there.
CMC should remove those inactive cryptos so that newcomers won't be confused and won't create unnecessary blunder specially when investing into altcoins.
Yeah they have to.
I searched for bitconnect and its still there despite of being delisted to all exchanges and exposed as a scam, it's still listed there. They need to filter their list for the sake of newcomers since they are the most visited crypto price tracker.