There are bounty campaigns that doesn't require hunters to post their social media links.
Some hunters behave like bots by posting what is not required and they are breaking the rule in bounty section.
This is what they are breaking:
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 or the requirement is against the forum's rules 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.
This is how I report their posts after asking their bounty manager if posting social media link is not really required:
Posting social media links on the bounty thread is not required by the topic starter, and this user has broken this rule- https://bitcointalk.org/index.php?topic=2284371.0
Their posts will be gone the next day! But I'm not sure if they're perma-banned or temp-banned though.