Once I passed KYC. At the end of the bounty, the company announced the need for KYC, and I was sorry for the work done. Now I'm regret about that.
A fake ID for KYC is a good idea, but its better to refuse a few dollars and save privacy.
If i's just a bounty and not a large investment I see the point using fake IDs, especially if they change rules and require KYC at the end of the bounty. Most do this with a dark motivation anyway, speculating that a large part just won't bother with it and they keep the rewards for themself.