You are quite right. Not all KYCs are actually safe for one to do. Apart from ICOs, some airdrops sometimes require KYC of which you will later realize the airdrop to be fake. What then happens to the information they collected? Will it still be safe?
Additionally, cryptocurrency is know as centralized and also the users are unknown to the public, actually as a computer literate it is always not safe to show true identity via internet. KYC will be a threat to all campaign hunters and traders . For example was phishing sites, key loggers and other ways of hacking your personal details . It'll also be safer for those who have large amount pf bitcoin .