So if you invest real money in the project this means that you should have trust in it. If you have no trust in it i would not invest my or my money in a project. On top of that giving an fake ID makes not the real owner of the account
That's right, fake KYC is only suitable for you to participate in bounty or airdrop. But if you use exchanges or take part in projects, I think you should use real KYC to avoid the trouble later.
It is illegal to use someone else's documents for verification and may cause serious problems for the person whose documents you use for KYC. I think it would be a good decision not to use verification at all to confirm participation in bounties and airdrops if you don't trust this project.