I would just give them the benefit of the doubt. If someone is stealing baby formula you keep your god damned mouth shut. End of story. Even if they steal it to sell it, it probably means that someone might be able to afford it down the line. I would not risk ratting someone out for trying to feed their baby. How is this even a concern? It might not be someone who tries to feed their baby so I better rat them out, just in case? That’s fucked up.