Oh, don't be silly. Using a full sized oil filter in a PS system that doesn't even contain two quarts doesn't make much sense at all, not to mention the cost involved, the need to change $40 filters periodically, and the difficulty (perhaps impossibility) of finding a place to hang it anywhere near the other PS components.
Ideas must be evaluated, it's a simple as that. My evaluation is directed at the idea, not the person advancing it. I called no names. I criticized only the idea, and did so only on its merits. What else? Lie? Say, "Oh that's a wonderful idea," and perhaps encourage others to spend their money unwisely? Of what practical use is this forum if we're so politically correct that we can't have an honest exchange of ideas?
I would add that deleting the photo of the idea being discussed makes the thread poorer, baffling to those who didn't see the picture, and makes the discussion impossible to understand. I would ask that you repost the photo, JV.