I think what you've highlights, intentionally or inadvertintly, is how one joke which may be considered poor taste, but in the context of this thread somewhat makes sense, could come back to haunt you years later when people just take that one line and ignore everything posted around it, others in the conversation and the entire context of what was being discussed. That is the sort of thing people calling out that on the whole I have no time for, especially if the comments were from their school days.
Personally I think social media also needs to do more to protect individuals - I think at least as a default that all users who join a platform before their 18 should have their posts from childhood hidden from public view as default, and arguably no reason either for posts from anyone more than a year old to be viewable either. It isn't about not holding people accountable for their previous actions - it's realising that previous actions may be a result of immaturity or may just not look acceptable now outside the context of why they were posted at the time.
Personally I think social media also needs to do more to protect individuals - I think at least as a default that all users who join a platform before their 18 should have their posts from childhood hidden from public view as default, and arguably no reason either for posts from anyone more than a year old to be viewable either. It isn't about not holding people accountable for their previous actions - it's realising that previous actions may be a result of immaturity or may just not look acceptable now outside the context of why they were posted at the time.