Share 'What is the consensus on photocopying zines?'

What is the consensus on photocopying a zine you really loved for a friend? I've occasionally wanted to do this but have stopped short every time. The conditions I envisage are that: (a) the zine is sold out; (b) the zine is out of print; (c) the zine maker's contact details net no response when you contact them re availability or for permission; (d) it's a zine you don't want to give away beca…