In the past, level 1 character that were Inactive for 9 months dropped ears when they were deleted. Which leads to a lot of pointless ears sitting on homeworlds. I also heard people say before that they had acquired ears before choosing position, which makes me think characters that didn't choose a starting location also dropped ears, and these sometimes attach themselves to characters.
Deleted players don't do that anymore, but hopefully that explains a little more about where they probably came from.
"May the Grace of Ara go with you, and His Vengeance be wrought upon your enemies."