I recommend not doing PoA if not required, because it is considered to violate the rules of the forum which will likely be banned.
Anyone posting info from their bounty application (usernames, addresses, etc.) or anything alongside the lines of "joined X", "looking forward to getting X", "thanks for the opportunity", "filled out form", "signed up for X", "applied", "following / liked / retweeted X" when such data is not required by the bounty / airdrop / giveaway / whatever (e.g. the bounty takes entries on a different website) or the requirement is against the forum's rules (e.g. when a giveaway requires users to post entries for low effort tasks) risk having their account banned. These are extremely low quality posts that generate massive amounts of spam, drowning out any legitimate discussion these threads may posses.
If the bounty manager doesn't ask for PoA, assume the manager knows how to deal with scammers. Or write your complaint in the bounty group.