I read this article earlier about three rabbits that had been abandoned, with the most probable reason for their abandonment being their ears:
http://www.dailymail.co.uk/news/article-2092618/No-loves-Three-earless-pet-rabbits-abandoned-basket-doorstep.html
I have always hated it when people abandon, neglect, or outright abuse animals; if the reason for Benny, Bluebell, and Polo being abandoned was solely because they were "imperfect" from the state of their ears, then the previous owners are truly despicable. It is not as though the rabbits chose to have one ear (or in Polo's situation, none at all), and they deserve to be treated kindly and given a good home regardless of what they look like.