It was shared on here that that story stemmed from the fact that classrooms are keeping kitty litter handy so kids can shit in a bucket during school shooter lock down incidents.
Tiny bit of truth ÷ deflection x thing I hate = popular lie
The way you create a narrative is by saying something that's ninety percent true, omitting a bit of context, and sprinkling in one or two lies. That way, when it gets debunked, the firm believers will just say that it's close enough to the truth.