He deserves EVERY single piece of negative response he gets for those comments. Even then, he was being trusted with people's private information, a trust that he not only disdained, but he openly expressed a desire to abuse.
If that were the only insights into his personality, I'd agree that "context, age, blah, blah, blah", but when taken with everything else about him, it paints a picture of a guy that I would want nothing to do with.
The real question, though, IMO, is whether interacting with Facebook is really having anything to do with Zuck. I wouldn't want to actually have business dealings with FB, but, at this point, to what extent could Zuck "fuck them in the ear" (to use his eloquent phrase)? I think the answer to that is not so much (I do have an account) but enough that I'm not going to go overboard (minimal status updates; photos are backed up not stored on FB; no use of places or likes; etc).