The list will become longer and longer because exchanges born and die over time. So, I think we should stick with essential rules. People tend to be greedy and fall into traps of new born exchanges, with airdropped, ref campaigns, and so on. Then, weeks or months later their birthdays, they make scam exits. Consequently, greedy guys lose their money, and maybe lose their main emails too (if they use main emails to register accounts on scam exchanges).