As a future medical professional I see this as absurd. Look around the news and see the rampart issue of counterfeit drugs then think again about where you get your medication from. Not only that, but uses like this is what is contributing to the rapid development of resistant bacteria. Drug companies aren't putting as much effort into researching antibiotics like they used to, and if I recall correctly we're several years off from new antibiotics. I highly doubt your average layperson knows which gram negative and which gram positive variants amoxicillin exerts its bactericidal effect on or how to identify if that is what they are suffering from, what the common side effects are and how to identify a type II hypersensitivity reaction.