The "most foolish" loudspeaker tweak/upgrade ... is

You guys are somewhat restoring my faith in Audiogon!  Good to hear the silent majority (or maybe minority?) who have been beat down in the name of forum decorum whenever discussion of these "tweaks" come up.  Free or low cost "tweaks" is one thing, but the next step always leads to the high priced "audiophile" versions.  Yes, I haven't tried them.  No, I won't and don't feel bad or hypocritical about it either. 

I think the problem is that peoples' mental self influence is often stronger than their audio memory or discrimination.  I feel it myself most times I try out a new piece of audio gear that I've just purchased with the intent to upgrade. 

Actually, the poster above's comparison to fashion might be the best I've heard.  Fashion is totally subjective and in no way quantitative.  Of course fashion is fi kle and influenced by celebrities, price, ....   There is no objective measurement nor any pretense of one...  The audiophile world is very different on that account.