What is the Silliest Accessory You Have Ever Seen.

I heard PWB demos back in the 80s. They work. Except, they don't. Your brain processes inputs with more quality the second time. Try reading a page from a book you've never read. Twice. So the con is to play music without the tweak and then with the tweak. After that, it's psychological. 

Some guy makes a parabolic-style reflector from thin laths of wood. It sits behind the speakers. It works much like cupping your ears. Not bad until you hear the price. $30,000+.

Got to admit the worst is the GeoffK phone call. At least it was only $60.

With sincere apologies to OP for going off topic.

@millercarbon From Wikipedia, Snowflake is a 2010s derogatory slang term for a person, implying that they have an inflated sense of uniqueness, an unwarranted sense of entitlement, or are overly-emotional, easily offended, and unable to deal with opposing opinions.

Snowflake is especially used by hard learning politically right people to denigrate liberal people .

Ironically Albert Einstein would today be called a snowflake by those disagreeing with his liberal politics.

wsrrsw--Nice.  And you know the meaning of "denigrate", whereas MC seems not to know the meaning of the word "demean."   
But in terms of the specific accessory here, I'm told that listening to music with this in the room will be overly fatiguing unless you paint the edges green.