With the latest events and with such a frequency of data leakage, I think that it is not the best offer to trust your data to outsiders, but on the other hand, it is necessary.
In my opinion, usually is not data leakage, but intentional sell. I am very sceptical about KYC on first place, but when I see KYC for a bounty hunters or Airdrops it screens Problem! in my head. They don't need your data, they want it, and this is huge difference.