I'm Like

Anatoly Liberman, the Oxford Etymologist, discusses misuse of the word like. But he doesn't touch on the most annoying misuse, one that makes me gag whenever I hear it, "I'm like" for "I said". Of course, I'm just a linguistic troglodyte. Laxicographers have probably already enshrined this solecism in their dictionaries.

I looked around for a discussion of "I'm like" for "I said", and happened on Isabelle Buchstaller's article He goes and I'm like: the new Quotatives re-visited. But I couldn't get past the first two sentences:

The new quotatives, like and go, have assumed quite a number of functions outside the quotative frame. So far, all models proposed to explain their polyfunctionality rely on the postulate of unidirectionality in grammaticalization.