Accepted practice in regard to how it's a practice that is ongoing? Yes.
Valid in terms of being a worthwhile lubrication instruction? No.
You may or may not have noticed that some of us are in or come from the military, and you may or may not have noticed that a lot of the info about weapons employment and maintenance that comes from the military is wrongheaded tradition for no better reason than tradition itself.
What has been noticed is that you introduced bum scoop into the thread, that you don't even utilize yourself, by your own words, and have become argumentative for the sake of being argumentative because others called you out on it and have told you to not piss on them and tell them it's just raining. I gave you an out in my initial response, one you chose to not take.
That finger you're pointing over derails? Look at your hand; you'll notice three fingers of your own pointing at you.

