It depends on where you are. In the US, some activities like this might fall under fair use, and therefore be legal. In much of the rest of the first world, the ways in which you can copy or share a work under copyright are specifically listed in the laws, and the mere act of making the copy might itself be an infringement. However, also in those places outside the US, non-commercial infringement is typically a civil matter and you'd only be on the hook for actual damages, which might be zero or close to it in the cases you described anyway.