Most people I know hate to make KYC, but they have resigned themselves to it.
You have to trust the KYC provider, many emails, identity cards and addresses have been misappropriated and sold in the last 2 years.
There are lots of kyc providers and we don't really know which one is really secure. The providers you think they are trustworthy may be selling your identity and you won't know anything about it.
I would trust the most reputable ones. The ones i am most scared of is when the company claims that they will to do it by themselves.