I have seen evidence of some scams being run under the guise of KYC in order to gain your passport and government issued id's. Be careful out there and remember that a lot of these coins end up being scams. Do you really want them having your passport/photo identification? This is how people fall victim of identity fraud so please think before sending your information in.
You need to be very careful when choosing a project where KYC is required. Especially if you are involved in bounty or in airdrops, it can be very dangerous.