i think you ar ethe who is misleading.. those developer have an extensive research about those exchange as well where their token can be listed! do you think these developers want their tokens to be listed in a crappy exchange?
If they were smart enough and they will never take those scam exchange sites to list their token. FYI, there are so many or even 100% token that launched on the crap exchange sites like p2pb2b were scam and again that crap exchange site are still placed on top rank CMC based on daily trade volume. Dude, that doesn't make sense to happen but that's the fact.
In my opinion, coinmarketcap collects data on tokens and exchangers based on reports. But in my opinion the information contained in coinmarketcap is quite complete, regarding the existence of registered scam tokens, I think website visitors also need to inform them to avoid missleading