Sister in law has a little piece from a fishbone cactus potted up on her windowsill, just starting to show new growth. I asked if I could have a cutting once it's established, and she said sure, or I could just go to (fancy houseplant shop up the road) and see if there was a bit on the floor, because that's where she got the cutting.
She swears she didn't break it off - that it was already broken off and on the floor near the 'parent' plant (this is believable, the shop is really crowded and you have to brush by the plants to get through).
Her argument is that it was a tiny piece (true - it's an inch long at most) and that it would have just been swept up and thrown out anyway.
My arguments are 1. unless she took the piece to the proprietor and asked if she could have it, it's still stealing. Who's to say the shop owner wouldn't have potted it up herself? and 2. the proprietor paid for the rent, soil, plant food, and put in the labour to create and nurture the plant that dropped that little one-inch cutting and SIL is effectively stealing that money and effort.
This wasn't an ACTUAL argument, just a discussion, I'm not dobbing her in or cutting her off over it, but just curious to see how other people view it.