That is why you get what is called a "oil filter" Although every one is entitled to use what they want. Toilet paper is not the correct filter media, Chances are his filter went into bypass mode and supplied oil to the engine anyway. As the filter media becomes saturated toilet paper beaks down. This is when the "old" filters failed and plugged oil passages. The "cellulose" in oil filters is coated to not breakdown in oil.
Generally the filters work with micron rating and store contaminants by directional changes which cause the stuff to drop out.
I'm quite aware that bypass filters have moved away from rolled filter media, that looks like TP. The old Amsoil bypass filters looked exactly like rolled TP on the inside, and they were in fact cellulose. The problem with that wasn't the cellulose, it was that the filters had a habit of "channeling" and reducing effectiveness. The bypass filter designs all now appear to use the wound style of depth filter. I'm quite sure this works better, and the added benefit is that they can sell you a new filter element.
From your posts I'm not sure you even understand how a bypass filter works....
You can test the "breaking down" in oil theory yourself. Take a piece of cardboard, copy paper, newsprint, and TP and saturated them all with oil. You will find out they don't break down, no coating required.
Well, were gonna have a difference of opinion here, so lets leave it at that.