Not being pessimistic but that's the reality.
Hoping that most of the exchange are responsible about its customers safety and monitoring of scam transactions.
Coinbase exchange will surely have a massive increase in its reputation as it prevented users to engage in a harmful scams where they will lose their money.
It is not only those victim's fault, but also Twitter's, their platform should be accountable about these scenarios where people don't feel any comfortableness in using their platform. I don't really believe that it is not their fault, scammers used a high profile personality that's why believing in that tweet is easy for those people who trust easily.