Don't even try to say that since you said I "can't use your pic" that it's illegal. You posted them for the world to see on facebook and that's where I got them from, Ive done nothing wrong. I took a screenshot using my computer making it my property and not yours. If you don't want those pictures used or viewed then don't post them in a public place.
I'm not going to sue, I'm just saying that your opinion on what's legal and what's not is completely wrong. It's still my image, regardless of the fact you took a screenshot.