The little-free-library on our block was out of books so we turned it into a community

how would you spike a can of soup? asking for a friend...

Poison, in a painted-on carrier, that allows it to penetrate skin, is not just a movie trope. Or, if you're the very patient type, slap low-sodium labels on full sodium soups, lol.

Oooo I like that last one

A syringe inserted where the cardboard boxes make little folds, toxic substances put around the lid where you put your lips on a can (not for soup obv)... Get creative.