I can't think of any specifically negative experiences that I have had over the years. Yes, many people do not want to hear about killing and eating rabbits. That's their choice. When I was young, we raised rabbits as part of our family farm and enjoyed many meals. As an adult I changed my diet and I no longer eat rabbit, but I have raised and fed rabbits to my dogs for years. I find them to be just about the perfect food source for my dogs and I really cannot wait to get back up and running as one of me elder dogs could really use the immune boost.
I think some of the negativity comes from the idea of "cages". Too many people watch too many Sarah MacLachlan commercials and associate cages with suffering. I try to do what I can to enrich my rabbits' life, through enrichment toys, feed variety and the occasional foray out into the wide world. The kits that are being raised for meat are treated equally as humanely, just not named and bonded so closely with.