Best of all:
"What do you know ABOUT #QAnon?"
6 words, under meme limit of 7 words
Does not imply whether QAnon is a person, a movement, a phenomenon, just a hashtag, etc.
By being vague that way, has same effect as socratic question. Makes the reader assume they OUGHT to know something about #QAnon and maybe they will feel left out, missing something important, if they don't try to find out what #QAnon is.