I'm beginning to hate the sight of that phrase 'cargo-cultish'.
I'm sick of the term myself. I believe, however, that this was the first time I've ever actually used it. I used it with its proper meaning in mind too, although it may not have fit as well as I thought it did. I honestly thought the or-empty construct was being included more by habit than for any real purpose. Of course, it does avoid a possible warning and I suppose that's reason enough for it. Maybe. It still bugs me.
I'm of the opinion that you shouldn't process parameters unless you expect them to be there. If you expect them but they aren't there, then the warnings are a good thing. If, however, you really don't want the warnings then simply turn them off.
"My two cents aren't worth a dime.";