The mix of "The same consideration applies to coordinate systems:" and "r u positioning urself..." in the same message is ridiculous to me and I can't take anyone seriously who speaks like this.

It's not illegal or immoral, but it is at the very least, demonstrably distracting from their own actual substantive point. Here we all are talking about that when they otherwise had a perfectly good observation to talk about.

Everyone is jumping on your use of the word "serious" as though you meant serious like cancer instead of just not texting ya bro bout where u at tonite, as though there are only two levels of formal and informal, the two extremes.

If this is so casual and we are txting, then why did they use punctuation and no emojis? Ending sentences with periods is verbal abuse now, so, I guess we're not txting after all? Pick a lane!