I am a bit scared that some ICOs and recently a well-known bounty management group have decided to ask for KYC for bounty hunters. For me, that puts me on the spot of choosing if I want to risk to send my documents on line for not much money or just decide that I should not do any bounty.
The worst thing is that sometimes the KYC is asked after the promotion is done. For me that is just blackmail. What would you say if I agree with you to pay you 300$ to paint my fence and once you finish I decide that I will only pay you if you give me your address, copies of your documents and a picture of your wife or husband.
You're making a valid point with the fence painting analogy. Privacy has always been paramount for me, and the KYC for bounty hunters being a mandatory part of an ICO must be highlighted in bold (and probably some neon color

) on the front page of the respective Internet page, be it a website or a dedicated thread on here.
I would be enraged if I had to deal with it upon completion of my required tasks.
The solution to this is to inquire the bounty management before you start anything.