Oh boy, here we go... this is where a million arm-chair-trained "linguists" will tell us the perils of using words such as "like". This sort of use is NOT a bad habit. It does NOT lack meaning. And, the various uses are, linguistically speaking, syntactically functional and perfectly fine to say. I recommend that the creators of the poster change their title to "Academy of Prescriptive Linguistics Awareness". It more accurately describes their school marm ways. Now, if only they were as anal about their use of punctuation in their taglines.

Sincerely,
The Academy of Punctuation Awareness.
"Don't look like so stupid,,,, like stop using unnecessary commas"