I stand by the post of mine that Margaret quoted: I think Connie Yates has completely lost touch with reality, most specifically the reality of her son's condition. I have empathy for why that might be, and for her generally, although it is definitely tempered by serious concern about what that has caused.
I do think that posts about sunglasses, facial expressions, etc. are out of line. People have been convicted of actual crimes largely because their grief reactions, in a complex and hugely difficult situation, don't match up with what armchair psychologists who have never experienced these things think they "should" be. Life still goes on when you have a very ill child; you have to eat, take breaks, maybe even wear sunglasses because when you dare to go outside, the sun might be in your eyes. (Or perhaps your eyes are sore and sensitive from crying and sleeplessness.)
I don't think Chris and Connie's actions are above criticism; as has been rightly pointed out, parents tragically have to make these decisions every day, and it is rare, very rare, for it to end up in this kind of situation. But it should be informed, and as much as possible, empathetic criticism.