In the facebook group of Backyard Chickens, you'll see a lot of people hating about crossbreeding.
And yes, this is my project. Right now I am figuring out what's the best percentage of ayam and silkie to be crossed with an australorp. I will soon find out once they produce chicks.
A lot of people were hating on other breeders that cross their chickens with other breed. Here is my opinion:
As long as you are treating your chickens right (by providing their basic necessities) and breeding to create chickens with distinct characteristics like for more meat, eggs, color...