Google has been universally panned for using their logos as app icons. I think most people in this thread are talking about UI vs app icons (essentially avatars for apps at this point).
Here are some icons I screenshotted off a website. I challenge you to tell me what they mean
http://www.marginalia.nu/junk/icons.png
http://www.marginalia.nu/junk/icons2.png
Hint: „ǝsıɹdɹǝʇuǝ ʎɹʇ„ sı dn oʇ ƃuıʇuıod ʍoɹɹɐ ǝɥʇ puɐ „sǝsıɹdɹǝʇuǝ„ sı ǝqoʃƃ ǝɥ⊥