Perhaps we need to ban their IP address.
That would be ideal, but here scams are unfortunately not moderated. No one is going to be banned for attempted scam. Although you can report it directly to mods if they post another airdrop. This is the best chance some of their accounts get nuked/banned or if what's sandra_x says is true, you can also report it to mods for spreading malicious links/software (but I'd rather go straight to google and report it there, so they can take it down - their app).
Other than that, any other ANN or Bounty, please post here. We will tag all of them.