When I tell my friends about the airdrop, their concern is it being a possible wallet drainer since you need to sign. How to prove wrong?

Is there any evidence to show that it is not a drainer that might be activated later? Did anyone with technical skills inspect what is actually being signed and broke it down and can clearly show it can't be a drainer? I am not technical myself nor are my friends. But I want to prove them it's not a drainer.