I think the post that you linked to describes a much simpler case: One Google account violated the policies and could land Google in bad water (privacy laws around children as well as COPPA), so they blocked access to that specific account. It can be argued that it is reasonable. It can also be argued that Google should put more engineering effort in collecting less information especially when account holder is minor.
However, blocking access of other co-workers as well as blocking access to personal accounts (which are simply set as recovery accounts, and could as well be accounts of spouses/partners) because of some other account holder's mistake is completely different. So, I would argue that the incident described in Reddit is indeed the first case.