I work as a copy editor along with being a writer and it annoys me no end when writers tend to forget what they are submitting is an article for an established and respected publication, and not a personal text message to their best friend. It is true that many abbreviated versions are accepted and might even be familiar terms for many but it is simply not acceptable to publish it that way in a print or online publication. I am a writer too and might be guilty of many a slip in the process of writing my piece (I am famous for typing faster than I think!) but I would never do that to another editor/ copy editor - submitting my piece with abbreviations used in texts and messages. So next time you want to use pls in your article remember it is please, and thru must be spelled through and your editor will appreciate you for it!