I was on the subway and saw "DON'T LEAN ON DOOR" and remembered this thread.
Your comment about "this" and internet shorthand and memes is not related to your grammaticality judgement, unless you are admitting to conflating "clarity" with "propriety".
Your comment about "this" and internet shorthand and memes is not related to your grammaticality judgement, unless you are admitting to conflating "clarity" with "propriety".