Well there must be more to this story .. if not, I don't see any laws that were violated
What law does it need to violate?
Here's a hypothetical for you:
Do you think that in taking photographs of the cheerleaders (creating a marketable product) and posting or selling them to a shady website for profit or pleasure, that this 74 year old man should at some point get the permission of the subjects or perhaps get a signed release?
Even if that was not his intent, it's time to stop playing stupid here. What purpose did he have in mind for these photographs? It is part of the job of the school staff to protect these children. And that's what they are...children.
This guy wasn't at a Laker's game taking pics of the Laker's Girls. And if he was, how long do you think the LA Forum Security would put up with that?
It's time to stop protecting these pervs under the guise of Civil Liberties.
Technically, probably none, other than the Law of common sense.
Of course, if he chooses to snap opportunistic pictures of young girls in compromising positions and post 'em on the web,
than I can't blame said young girls father if he takes the guys camera and smashes it to pieces on the bridge of this perverts nose.
There's a reason this culture is spinning around the drain, and it stems from exactly the kind of legalistic permissiveness that you've suggested.
Thee are plenty of things that are OK in moderation, but if carried to the extreme can cross the line.