Really if there is anyway to erase scammers off crypto space it would have been better, 2019 would have bring better results for altcoins if not for scam projects everywhere scamming new investors, now scammers are scaring off new crypto investors wannabe since there is no trust or whatsoever and investors don't want to lose money either, whatever the next altcoin results is going to be will not be huge as many expected due to investors not trusting new altcoins anymore, no wonder why binance launchpads are selling out in seconds.
If crypto space is just like how binance managed IEO project in return for their own reputation altcoins will be skyrocketing right now because much more money will flow in, exchanges like binance is giving out trust investment that i really hope the entire altcoin space can do the same but its a shame scammers are robbing off the trust
It will be almost impossible to filter out scammers from legit projects but there are ways. One is to confirm the identity of the people behind the project. Not all pictures of the CEO or the dev team you see are legit. I have a friend that encountered a project that is actually a scam and they used stolen pictures from other legit projects.