I was wondering something, and if this is the incorrect forum, please let me know. Hypothetically, if you are shooting a crowd scene, for instance, in a night club, do you have to get the permission of each and every person in the audience to use footage of them in your scene? Let's say the club is full of actual people, and not extras or actors. Would it be acceptable to post a sign outside of the club, the night of shooting, to let people know that if they enter, they are giving permission for their image(s) to be used? Just a thought I had, and was wondering. Any comments greatly appreciated.