As you may have heard of byteballs airdropping to Steemians, but yeah you can think of scammers jumping into this when there is byteball airdropping all around.
Some guys try to steal the byteball wallet address posted from someone's else posts and send them the attestation fee in order to get that referral rewards.
While some guys go on spamming their byteball wallet addresses on the posts which are about byteball airdropping in order to collect byteballs in the name of attestation fee.
So, before sending attestation fee to someone's else wallet, do confirm if they are scamming you and spamming on other posts too to steal byteballs.