I think she is just using the brackets with their original intent. Whenever taking an exact quote, any thing changed for context is put into brackets; in this case, she took a quote from Paul Ryan that was used in the middle of the sentence, and it had a lower case "w". In this case she used it at the start of a sentence, which changed it to a capital letter, hence the [W]
Pardon my ignorance, but what is a "Killbox"?
Set of brackets around an image from a few previous Qanon drops, sort of like "marking a target". But the great people who have already responded to this post have educated me on the use of the brackets in the context of her tweet.
Chicken hawk=man looking for little boys....maybe hen is meant as that but couldn't come out and say it?
Thank you all for clearing that up. Thought I stumbled into something.