Nope. Almost every arena or venue has similar statutes saying that upon entering the venue, you are under assumption of being photographed. As for a wedding, if you (attendee) think a model release should be signed you apparently think you are more famous than the person who invited you to their wedding as a guest! I do recall a post a while back where a person was attending a wedding who was a no-name model who was trying to shirk that lowly title and become a name. She had some contract where only "X" could own images of her. Made a big deal for a wedding photographer here I believe.
Still amazes me how much Americans think having their picture taken steals their soul or something. Where I live, people don't worry about such things and lead pretty simple lives. Litigation and worrying about such things is not a daily worry.
Have you had issues with spectators or "others" not allowing you to cover an event?