Except that it IS possible that someone saw the bikes lying in the middle of the path and leaned them against the fence, so they wouldn't be a hazard. This is something I would do (I'm a mom, obviously and do all sorts of stuff like this)
Very possible. And, just because we don't know about such a person doesn't mean much. They may have contacted LE with the info and asked not to be identified publicly. (Just brainstorming.)