In the old days, in Adelaide, we had precisely this problem. A couple of very pervy young men, both armed with cine-cameras(the 50’s equivalent of the mobile phone), were shooting film of attractive young Sheilahs.
One pretended to be from ABC, one from Fox-Australia, and both pretended to be researching for documentaries and news features. Neither knew of the other’s activities, which makes it all the more remarkable, rather like your cricketers finally winning a game the other day!
Anyhow, our informants(of whom more shortly), let us know that one of these prototype Russ Meyers was busily filming washing lines, and always washing lines containing the panties of the previously-filmed young ladies.
The other was busily helping himself to the said underwear. He then mounted it, and not in the biblical sense, as a trophy in his bedroom.