[FreedomOfExpression]

The rest of us are not telepathic, so it's hard to tell if someone doesn't know or if they are being sarcastic.
And you seem smart enough to know that you shouldn't assume.    :^)

[Telepathic Intruder]

I had a boss that kept saying to assume makes an ass out of u and me (texting of course). I’ve been sarcastic before and gotten indignant responses, not just on the internet but in person. The thing about sarcasm is that you must fall short of crossing the line of being serious, or it’s no longer sarcasm. The line is variable, however, depending on the intelligence of the person receiving it. Any sarcasm can be misinterpreted by the average house plant.