I love rainbows and bright colors. I was upset when I learned as a teenager that the rainbow represented gay people, a group I was not a part of. I was happy when i learned a few years ago it also represented autistic people, a group I am a part of. I dislike the puzzle piece ribbon, however, for two reasons:
1) It reminds me of autism speaks. Although they use a single blue puzzle piece, it still reminds me of them and it make my blood boil.
2) I hate the whole ribbon thing in general. I'm glad that those stupid "cause" rubber bracelets finally went out of style, but I'm sick of seeing damned ribbons on peoples cars as bumper stickers and on products in stores, and pretty much everywhere. The only awareness these things bring is that the world is full of people who like to advertise, "hey! look at me! i'm a good person because i support this cause!"