Noice!
Each time is see an Q sign captured in the wild, I get a “Who Is John Galt?” vibe and knowing that it is spreading organically is even better!
“Galt is not necessarily intended to be a rounded or realistic character; he has been called "more a symbol than a person" and "two-dimensional". Mimi Reisel Gladstein describes Galt as "more icon than character". Rand's own notes indicate that she expected the character to have "[n]o progression" and "no inner conflict" because he was "integrated (indivisible) and perfect".
"Who is John Galt?”
The book's opening line, "Who is John Galt?", becomes an expression of helplessness and despair at the current state of the novel's fictionalized world.”
https://en.m.wikipedia.org/wiki/John_Galt