This is what I'd say to that man
I pray for the souls of those few rabbits. Why talk about how bad they are when you never pointed out that the time you had with them was lovely. I also do not appreciate your decision in the first paragraph of "my 4 and a hlaf year long experiment" I did believe we were talking about pets, not lab pets.
All animals are destructive whether they're trained or not. There is no such thing as a "perfect pet" all animals have fault as same with humans, humans are destructive, boring, ill-tempered, unrewarding people. But why then do you have a wife?
Because they give love when you treat them right. They'll become more friendly and funny and unboring. Tell me that every single human are all the same. Now tell me that you treat them all the same.
All animals require love whether you love them or not, I ask you. When you walked in to greet your bunnies what was their temperment like? What was your temperment like. All animals take time and care and loads of money. Even fish, guinea pigs, rats, mice etc. They take lots of money because you really care about them and want them to have an amazing life. Your reward in turn is a happy animal. The way you described your rabbits was as if they are just a source of entertainment. Love is not a source of entertainment.
Jj