I would be a little angry about the lying, but one sets themselves up for this when they advertise "to good home only". This encourages people to impress you with their "good home-ness" when they have other plans for your free birds.
Not that I condone lying under any circumstance but this "good home only" stuff has always disturbed me....don't
you have a good home for them already? If so, just leave them there. If you really must get rid of them, why be so darned picky about the destination? In all reality, the next person could have a "good home" for them and then, like you, find they don't really want them after all and decide to give them to the first taker.
If you really want to insure your birds are treated humanely, don't give them away in the first place. Kill them for your own consumption or do not breed extra birds in the first place. This is the only way that one can insure that the animal that you raised carefully is not mistreated when it leaves your home.
I've always wondered about that same thing when people who breed puppies, kittens, etc. and then specify that they are free but to a "good home only"....seems hypocritical to me. You don't want them but your going to be darn picky about giving them away!
I had a lady the other day that wouldn't give me one of her free kittens when she found out that it would be living outside. She didn't feel like that was a "good home" apparently. The day that I did find a kitten, she came to me and said, "You can have that kitten now....I am the only one feeding and caring for them and the kids won't help, so I don't care where they go now!" I took immense satisfaction in telling her that I couldn't take her now unwanted kitten to my "not good enough home" as I had already committed to taking a kitten from someone who didn't provide stipulations on her unwanted excess animals.
I now have a very wonderful kitten that has a loving, caring home and hers are still living in her kitchen, making messes for her to clean.