@RangerBen does have privileges, however, this account doesn’t.
When I saw it come up on my work account (rangerben), I checked it on this account and I could still see the location. So I suspect there was a glitch which didn’t hide it. I appreciate you changing it.
@MichaelBedingfield I edited the sighting yesterday to explicitly tick the "suppress location" box, so it certainly should be hidden now. I'm guessing @RangerBen could see it before I edited it - or does @RangerBen have extra privileges to see hidden locations?