There are no bad cards in the Tarot, any more than there are any good ones.
This idea has been simmering in the back of my mind for a few years, and I've contemplated writing a book about it. Instead, I'm going to start two blog series:
When Good Cards Go Bad - This will be about the unicorn-pooping-rainbows cards that many Tarot enthusiasts assume are all nice and beneficial. I shall shoot these notions full of truth-bearing arrows.
Bad Cards, Bad Rap - Conversely, some think there are "bad" cards in the Tarot. Hell, some Tarot readers even remove them from the deck! ::passes out:: For these often maligned cards, I shall offer redemption.
Look for the first blog post soon. Might even do a video post, come to think of it.
Any particular cards you want me to tackle first? I'm thinking of crashing the 3 of Cups party, myself...