There are all sorts of things that pop up, mostly because of what your phone "hears". Maybe you were unaware of this, and if so, it's ignorance. That being said, if you don't have the stones to OC, then you probably should keep your fingers from typing stupid things and not let your ignorance be known.
Well, in text, there's no way I can tell sarcasm from serious. Put in some emojis if you want to express yourself in that light. Otherwise, I'll take it as written.
And, what if they did? Don't post stupid things, I won't call out stupid things. If you post sarcasm, then you should make it known to the reader. You know how many folks get hung up on articles from the Babylon Bee????