when you have 140 or 260 characters to make a point & on top of that it's just social media & not a final exam grammar hardly seems important. Now when it comes to saying angry or possible things there should be thought put into it to try & help make sure even the simplest of comments isn't taken out of context. But its all nonsense which is why I don't use social media I suppose youtube is to some considered social media but not in common sense like say FB or tiktok or tweety.
