text: it seems to trace back to v1 by blocked user ne2 with changeset comment referring to post-redaction; unfortunately i can't infer what redaction this is, whether it was the mass-copying from google or something else entirely.
  
  potlatch1 tells me there was in fact a redaction in this area, the history of which i am unable to view.  i would not be surprised if the FIXME was added for this reason.
  
  sorry that i couldn't bring clarity to this and can only speculate for the reasons given - a changeset comment is pointless for a mapper who is no longer active.  if you know the name, of course, don't let the FIXME deter you from deleting the same.