To us or the flock? We are animals, analogies using other animals shouldn't be taken so heavy? Bring any herder to the city and see if he finds a difference.
"Flock to the polls" is a common phrase in headlines. So that’s some evidence that others see voting as flock behavior. I don’t think I’ve ever seen “flock to the jury boxes” though.
For whatever reason when I see a “flock to” headline I think of birds, not sheep. Specifically I think of flamingos.