Im also afraid on KYC because it can really be use into dirty things, but I cant do anything about it because I need to fill it up as one of a requirements in big exchanges. Just be careful on giving your information on any ICO because the risk is high there.
Because it relates to the trust given to the bank, the trust is manifested in the form of secrecy of who buys his valuable letter. Or, in everyday language, banks maintain the confidentiality of information relating to their customers.