Sorry, but I think you both are being too hard on Cilic. Blisters can be really painful so I'm sure that played a part, but whether it did or it didn't, or if it was just the pressure of the moment that got to him, I don't see why he should be ridiculed for it. He's a human being, not a machine, and sometimes people's emotions just get the better of them. There's no shame in that.
As for the Federer children, from what I can see the girls had blonde hair when they were younger, and it's not uncommon that kids who have fair hair when they're young grow darker as they age. I did so myself. I had very fair hair when I was very young, and both my parents have dark hair, and now my hair is darker too.