I would never join a airdrop or bounty campaign where kyc requires. For icos it´s ok but not for airdrop or bounty.
In my opinion is this not necessary, I think they want collecting user informations and maybe do some bad things with that.
Or what´s the reason why they want kyc? So be carefully!
The reason icos ask for your information has to do with the new regulations that governments have imposed on them but as far as I know there are still some jurisdictions where icos do not need to ask that information from their clients, so it is possible we are going to see from now on a migration from many icos to those countries and I also think that it could be a way to market your ico, while everyone needs you to go through KYC a new and good coin can say they do not need that information out of you and get more investments that way.