not to be too picky but Gaffney's title was correct,, the word is "couldn't",, if you could care less then you actually care at least a bit,, the opposite of couldn't caring less,, good article,,,,,
"Audio-visual" is similar: It should be "auditory-visual" - referring to human senses - or "audio-video" - in reference to the capabilities of devices designed to stimulate said senses.
And don't get me started on "irregardless" :-)