We don't know the specifics of this situation. I believe we should consider several different situations.
Let's say the kid had a lot of schoolwork to catch up on or an important test or class early the next day. Would this be enough to allow the parent to violate the kids freedom to do whatever he wanted with equipment bought to him by his parents in his parents' house?
Let's say the kid had promised beforehand to play only until a predecided bedtime. Would the violation of such a pact be enough?
The console (reasonably since, being a kid and probably having no income, the kid wouldn't have been able to buy it himself) belongs to his mom, isn't it her right to use her property in the way she sees fit? (the evil libertarian element, if you agree with this one you're an enemy of the workers)
Sure, being permissive is great, but you can't expect a non-stupid parent to sit back and let their kids ruin their lives because they dare not intervene. And by ruin their lives I mean "using their time to grow only in one area, never being able to utilise their potential in other useful fields until they are grown up and have to do it".
How does sex affect others?