Lost -- question about Locke's dad?

Yes, that was his Dad. Wasn't he a peach? He played Locke for a chump though, taking him for his kidney and then ditching him. All in all, I think this character was the most heartless I've ever seen on Lost (and there have been some doozies). As you watch the show doesn't it ever strike you that there are so many negative father portrayals? Sun's father, Penelope's father, Hurley's father abandoned him, jack's father, Kate's father...the list goes on and on.