What is the Silliest Accessory You Have Ever Seen.

@lewm , Lightning (excuse my spelling) did strike my house in 2003 or so. Fuses saved nothing. Every piece of equipment that blew had fuses that did not blow and that would be, the telephone system, the burglar alarm system, two garage door ops, two preamps, and every computer in the house that was plugged in. The power amps that had bypassed fuses all did just fine. None of my breakers tripped. This episode is the basis of my opinion and the insurance adjuster backed this up wholeheartedly. The equipment protects the fuses, the fuses protect the house.
Power transformers are expensive and maybe very small ones might be delicate but big expensive ones are just huge slo-blo fuses. Maybe if you dumped 12 volts DC into one for 15-20 you might be able to blow one. You would certainly get it smoking. Transformers are not in the habit of seeing DC. I have never seen a transformer blow. I suspect if one did it would be more likely a manufacturing defect that took it out. 
The job of the circuit breaker is not to protect equipment it is to prevent fires. By the time a single piece of equipment is over drawing a circuit which is rated for it the damage to that equipment is carved in stone. Occasionally you get lucky and get a bad breaker. I am talking only about line fuses, not speaker fuses. None of my speakers have ever had them but if they did I would bypass them also. 
IMHE, which admittedly is shallow, electronic equipment failures tend to result in open circuits, not short circuits. The most common causes of electrical fires are here https://www.firerescue1.com/fire-products/firefightingtools/articles/5-common-causes-of-electrical-f...
In modern houses it is now rare to see faulty in wall wiring cause trouble unless someone drove a nail through it or played around with an outlet. Modern breakers are also very good. Several years ago I f---ed up and shorted out a power tool doing a repair on it. The very instant I plugged it in the breaker tripped. 

@eudisam, I hate to burst your bubble eudisam, it is all psychoacoustics. There is a connection between your eye and your ears. What you see changes what you hear. If you do not believe this, tonight play one of your favorite songs listening as carefully as you can. Now play it again but turn the lights off. Best tweak going! The more complicated the music the better this works. Any symphonic work will do. My favorite is Weather Report's Nubian Sundance on Mysterious Travelers. How's about a tweak you actually saves money! The Hallographs only make things sound better because of the way that they look. That is the scam. Sell them if you can. If not use them as towel racks, the hipsters will think you are cool. Steep price to pay but hey, we all make mistakes now and then. The Transcritors Vestigial tone arm I bought once was just as pathetic.  

$30,000 speaker cables that you must elevate off the floor .5,000 posts

There is a question here that is important. 
Masking is a concept we use in medicine daily. You can provide meaningful pain relief by creating a stimulus that is louder than the pain. If you don't want to hear your car rattle turn up the radio. The simple Band aide is such a technique. Put one on a cut and within a minute the pain goes away. When I give 4-6 year old's injections I have mom stand in front of them and they give her a big hug (looking in the other direction)
They never feel the shot. They always ask if it is over yet. Yup, then a giggle and big smiles. With adults you just squeeze the skin firmly and they don't feel it. There are numerous other examples.

So in audio we have these "tweaks" that in many instances have no reasonable explanation for effectiveness. Anyone with a science oriented education will say right away that they are bogus. Then some people swear on improvements which they are sure they are hearing when in reality if I did a blinded experiment they would not hear anything. But, is this any different than masking. Masking is real pain relief. Are imagined sonic improvements as good as real ones? Much of it is harmless enough. Some manufacturers come by it honestly. Others blatantly lie and create misleading and sometimes stupidly silly marketing to sell the product as in the case of the Hallographs. So, it is not only a quality argument but an ethical one also.
All of us are subject to virtually the same physiology. Education, training are the major difference. The training an electrical engineer gets is way different than what a lawyer gets and one will know virtually nothing about what the other does. Some of us will not hear an improvement because our training will not allow it. Others are more suggestible.  What I find most interesting is that you hardly ever hear of a tweak making things worse. The odds favor that a certain percentage should make things worse but the way we procure and utilize them always favors an improvement and that is purely psychological. 

Well, in that list of Stereo Times 2020 or so most desired components, I came across $2,844 “fuses”...

Seems like an excellent candidate.