Ok you are an old member of this forum and you have staked your address, so you can recover it in case your account was hacked.
and you also did a KYC from airdrops, bounty campaigns, and various exchanges.
And on all these activities, you'll only use one address
Then one day you woke up and found out you received 10000 Bitcoin
from a wallet coming from one hacker's wallet who just hacked one big exchange..
And so many people know who you are where you are located and your status in life
because you are using only one address...
So what do you think will happen to you now..
This might very fictional but the possibility is there.
What I'm trying to emphasize is to avoid KYC and using only one address.
I think giving back the bitcoin to the sender will be a good choice as our identity has revealed to the public and we don't want to get something bad happens to us. But to be honest, if I am in that situations, I will confuse to decide, maybe I need to wait for a moment and share my story to some of my friends because I have one or more friends who might know how to solve this and I think they can give the good solution.