If our data is provided to a person we don't know, it can also be used as a crime to avoid cheating on bonuses, so if the airdrop project wants to avoid fraud, the reward must be done in another way.
Yes its dangerous. Dont even use our data just for airdrop which will only give the small reward.
If you join ico which will give more profit then its fine to give to the project. To avoid such this thing then just not join the airdrop. Too many airdrop and its just like scam accusions.