Some emails include a tiny photo of a watch that is so bad that, without exaggeration, one would not guess it was a watch without the context that it was sent to me.
Today I received not one but two emails with nothing but a single word in the subject line, and no message body at all. These aren't spam. The sender is attempting an inquiry.
I don't have any sort of strong blanket objection to internet/SMS speak, in general. And I try to respond to these messages. But if one is writing to a stranger, in a professional or business context, it might be desirable to be understood, right? Using sentences would be a good start.