First time ban for no reason.

so I’ve been hitting the weekend social and due to his boredom/broken leg I’ve let my 4 year old play a couple of matches which has never been an issue before but I have now been banned from playing for X amount of time for what amounts to no reason he doesn’t cheat,AFK or anything ban able. While I get that he’s an easy target (being 4 and still learning he’s hardly going to be MLG but since when has playing badly/learning to play been a ban able offence?.