I agree. The communicator failed to recognize many who answer here are old and have a completely different contextual existence and something that might seem obvious to a high school kid is not so to those who remember Casey Kasem countin' 'em down. (While knowing he was counting them down.)The one who wishes to communicate is, IMO, the one who needs to do the adaptation. A poster who wishes volunteers to answer his questions for free, for example, should make their question clear. The volunteers should not need to be hunting through text speak and other abbreviations with no punctuation to discern what the poster wants.
https://cdn.vox-cdn.com/thumbor/kaZncwF8bwIdI9uSIleQxP07aOk=/0x0:1409x785/920x613/filters:focal(622x252:846x476):format(webp)/cdn.vox-cdn.com/uploads/chorus_image/image/55701647/Screen_Shot_2017_07_13_at_1.09.20_PM.0.png
That doesn't make him barely literate.