I have a sister who, though 18, is mentally around 6-7 years old. When she was small people spoiled her, talked about how adorable her behaviors were, constantly gave her passes because of her disability (even though some of the behaviors she understood perfectly were incorrect). She now acts outrageously. She hides, throws out, and destroys property that isn't hers. She talks inappropriately to people, physically acts out in public. Yes, she knows (as my own Jean does) that these things are "wrong" and "bratty" but she does them anyway because she's learned from history that she'll get away with it, and hey, it feels good to act out. My parents do the best they can, but other adults and carers give her way too much slack.
The child in the OP's link may not have any disabilities, but he's getting the same training that he can get away with this behavior and he's taking advantage of it. This is partially on dad, but it's also on every adult that passes off the behavior without consequences. If a child above the age of 3 grabbed at my glasses they would get a negative reaction from me, up to and including speaking to the adult "I am sorry, I have to go. My glasses are very expensive and I can't afford to wait for them to be replaced if Junior Brat breaks them."
We all have to learn to deal with negative emotions, and when those negative emotions result in hurting or damaging other people and their property, it is past time for society (and the parent) to act. Escalation is the key, as Sharnita pointed out.
PS--and seriously, "I want to bite you too"?