What’s your vote for the most ridiculous, overpriced, and useless tweak?

To quote from the PWB site

"...what you can do is to ‘treat’ the cables, wires, components, equipment and listening environment to give them different ‘energy patterns’ which we (human beings) are able to interpret as ‘friendly’., ‘acceptable’., ‘reassuring’ and ‘relaxing’. Once you do this, the human being can relax, be under less tension and hear (perceive) more of the information which is already in the room !!..."

But if you don’t accept/agree with a basic premise of the suggested operation of the specific device (in the case of the red pen, that "the past is black evil and horrible"), how can you relax sufficiently for the device to perform as intended by the designers, regardless of the resolving power of your system?

I sense your angst and trepidation. Geez, No wonder the Red Pen didn’t work for you. Assuming you actually did, which I doubt. You shouldn’t get so hung up on a manufacturer’s description of the device’s operation. 😬 Faint heart ne’er won fair maiden. So, you were too scared to try the Red Pen after reading the description? Anyway, the underlying idea behind PWB device’s, generally speaking, and the Red Pen in particular, is that the effects do not (rpt not) occur at the conscious level. They occur at the subconscious level.

I'll go the other direction....the best tweaks are a good glass of scotch, a poke of herbal essence and the wonderful cover of night.  System always sounds great under these conditions.

I see. You treat yourself. 🤗

Can we have a little bit of fun here, just as the original poster intended?
I very much liked the reversed carpet story! Why is this getting ridiculed???  If it's all about subtle influences, and all sorts of snake oil - why should the fibres of the carpet pointing in the reverse direction NOT have an influence? After all the exotic room treatment we have done? Hey - we are here in FREE Of CHARGE territory. Why not try ??? Some years ago my then little kids rearranged the Persian rug in front of the speakers, creating ridges and bumps to play with toy cars! Did it affect the sound? YOU BET. So, as long as it's FREE, any tweak is OK. Thanks to glow_worm for the inspiration.