I wasn't sure where to post this.?

So I have 5 kittens, free to a great home!! I posted  a picture on Facebook, saying "free to a great home!" Well my boyfriend has some friends who... Don't take care of things. They commented on the photo saying they'd like a kitten, and both my boyfriend and I agree they would not be suitable. But it's a close enough friend that I don't want to upset anyone! I don't want to be rude! What do I do???