look, you guys are talking about limiting TV and video games like this kid is a teenager and everybody is talking about "being the parent" and "making the adult decisions." This kid is FIVE, he is only watching TV/being at the computer/ playing video games because the ADULTS around him are. If you want your FIVE year old to stop watching TV, then stop watching TV yourself, get off your bum and play with your kid.
No...the child's mother (who knows her son and their family situation perhaps a teensy bit more than you do) says that he watches tv and plays video games to excess because he LIKES it. Why are you assuming he's modeling her behavior? Why are you assuming that she doesn't spend enough time with him? It's possible for parents to use the TV and computer in moderation and for their kids to NOT. (Or, sometimes, vice-versa.)
Five year olds in particular are not the best judges of what an appropriate amount of screen time is, and they certainly aren't masters of self control at that age. Your comments that the OP is a hypocrite and your crude implication that she doesn't spend enough time playing with him is insulting and ignorant. And your further implication that it's ALL HER FAULT because sometimes she uses the computer or watches TV herself makes no logical sense.
Also....why are you so dramatically over-the-top shocked that Thandiewe used the phrase "train up a child"? Because it's also phrased the same way in the Bible? Is it a terminology issue? Would "to teach" or "to raise" be better for you...? I'm seriously scratching my head over that one.