All conducted IDO require passing KYC and if you do not agree with this requirement, then you need to refuse to participate in the public sale of tokens.
Its funny some IDOs requiring KYC authentication when they are aware that IDO stands for initial dex offering, while the term dex simply means decentralized. Where is the essence of that when they requiring people to provide identity and the will to hold it. More or less if you want to join then comply if not then leave it.
OP is right. Stay anonymous as long as we can some of those platform might used the information in a bad way.