There has been a huge influx of passport available for sale on the Dark Web.
Also have seen posts where people are being accused of double entry into ICO's because the scammers used their passport information prior to them getting signed up.
That is why KYC shouldnt be required because our privacy might be compromised and our IDs might be sold to these cindicates who can use it in illegal activities,that is why i am not joining any of these KYC ICOs and bounty campaigns because i have used cryptocurrencies because i want my transactions be anonymous,anonimity is the first reason why i do use cryptocurrencies.