There's a tendency online to assume every post someone makes is made like they would die to defend it. Whereas everyone posting assumes they won't be taken more seriously than they mean to be. I'm really sarcastic and tend to say absolutely obvious bullshit as a joke irl and deliver it deadpan as fuck, which can sometimes lead to at work if someone's in the can and someone else asks where they're at and I say 'up on the roof peeling oranges' it takes a couple seconds for the tone and word dissonance to hit. Generally it's pretty quickly figured out that I might be doing a bit and that's worth considering when I speak but even being very dry IRL, it hits home although sometimes a bit later than delivery. It's really hard to get that kind of laugh from a mass broadcast in text. I try my best by wording things to indicate such but reading comprehension of your audience isn't guaranteed either. It can be a bummer.