Thing is, if it's non toxic, then it's possibly safe. Maybe not pleasant, but not poisonous. Just as bad as pineapple on pizza.
Wonder how long it'll be before we get suggestions about eating detergent capsules or drinking bleach to cure covid.
Training your AI on Reddit was never a good idea though, you just have to look at all the crap on there to realise that. Let's just hope they didn't use Facebook as well, or worse, Quora!
Regardless of how wrong you are about pineapple on pizza (pepperoni and pineapple is always a solid choice), school glue is made from PVA, and while not toxic, is 100% not food. Pineapple is still food at the very least
Non-toxic glue would be starch or gelatine - both used as base of some 'real glues', both with valid culinary use, including exactly this use case. We just don't call those 'glue' in this context.