That doesn't mean that there's no such thing as bad taste. And it also doesn't mean that people with ordinarily good (or even excellent) taste aren't capable of enjoying what should otherwise be considered fantastic crap.
It all comes down to how one chooses to disclose the frequent contradictions of their true tastes over the years. Too shameful and you'll be considered a drama queen and a snob. Too honest, and no one will ever believe that you're even capable of recognizing the finer things in art and music.
(Consider for a moment the mortification you might feel if your music snob friends learned that not only are Savage Garden, Bad Company and Trixter all on your iTunes, but that they all boast abnormally high play counts).
I say that apologizing for your tastes over the years accomplishes nothing, and only sells through a less interesting story of how you arrived at the tastes that you embrace today.
And so, witness the shitty (and not so shitty) concerts that I saw over a roughly 10 year span between 87 and 97. These stubs tumbled out of a photo album that I found when I was moving a couple of months ago. Most were in D.C. but there are a few from other areas, and a couple of sporting events and other assorted ticketed disasters in here as well.
I figured it would be better to go public and share them than to have someone find them after I'm dead and I can't fully explain myself.
...Which might indicate that I'm a little more embarrassed about my lousy taste than I want to admit.