15
In another posting of this, it was pointed out that this is just a game of telephone that started with someone saying "I dunno, maybe they used electric toothbrushes?!?" basically. There's no concrete evidence of this actually occuring and is just being reposted over and over as fact now that it's been picked up by bigger sources and now those sources are being pointed to as proof.
I forget the name of it, but it's when the original source is lost and all current sources are just an oroboros consuming itself. You have the original, shakey source, its picked up by a reputable source, then everyone starts sharing that as the source, giving the story credibility. Eventually everyone is just referencing a copy of a copy(sometimes with one of the copies even being credited as the OG source).
Most outrage media is this. One person said something on social media, it gets repeated by a source that "matters", and eventually it is "fact" with "thousands of supporters". The Starbucks Holiday drama is usually just a handful of people on Twitter being spread around, for example.
EDIT: FOUND IT. Was an old XKCD comic. "Citogenesis". When people don't pay attention to the original citation anymore because it's been replaced by "better" citations that validate it in a weird catch-22 way.