“It would seem to me that this person could be prosecuted under existing Peeping Tom laws.”
He was prosecuted under Oregon’s ‘peeping tom’ law.
Now, suppose you were the school photographer that took a group shot and one of the girls crotch accidentally showed under her skirt. Would you send him to jail?
No, because he was participating in a normal consensual function. He was not seeking to circumvent an individual’s normal assumption of privacy.
If he tried to hawk the merchandise afterwards for unapproved purposes, he would have opened himself up to being charged IMO.