(Warning: I am not going to talk nice in this entry.)
Didn't your mother always tell you that if you don't have anything nice to say, don't say anything at all? Then why the hell do you think it's okay do talk shit on Twitter?
Behind every social media account is a real live, breathing human being. Yes, that includes celebrities, too. Even the trolls and bullies are real people behind their sometimes anonymous avatars. But for some reason, there are people representing the lowest denominator of society, because their lives suck, they have to make everyone else's suffer.
Now we're not talking the fun memes we see circulating. While they make fun of someone's very public error, they're not intended to seriously hurt someone. In fact, a really good meme can actually get a nodding approval from the target, such as the original Texts from Hillary. There are some very clever and humorous tweets that also play into a high profile train wreck, such as the Melania Trump speech at the 2016 Republican Convention. It's like a Saturday Night Live skit. Consider it an honor that so many people took such an invested effort to feature you. It compounds the mistake, but the furor is short-lived. There will be memes that keep their staying power, usually an image, but for the most part, there is no malice intended with these kind of posts.
When they get vile, nasty, and highly personal, that's when you have a problem. Here are some terrible examples, but they are tame compared to some: