Very well, it seems to be a common courtesy to inform them that they will be attacked due to a bounty. Speaking of LP/LN tags, as a Bounty Hunter I would not be concerned about these IFFs. If however it was one of a criminal faction then I am immediately suspicious or concerned as they are indeed most likely criminal. It must be difficult for Liberty criminals as they will no doubt see red wherever they go. In other scenarios, it is quite easy for one of a Rogue, Hacker or Outcast ID to have one of the other IFFs, but either way they are allied so it doesn't really matter.