Nasty way lavos mentioned
I was just offering another perspective, I mentioned that it would be a jaded act and that I'd be pissed if someone stole it from me. But when it comes right down to the here and now, if someone else hasn't used it, and it's in the open for him to grab, then I say the 'owners/growers' put it there knowing this. If someone comes and 'liberates' some, unfortunate for one, but fortunate for another.
In a society where the ingestion was not prohibited, the would be thief would have probably been introduced at an early enough age to grow his own without the need to eat it for immediate alleviation. Now, he might be about ready to jump ship here, and that lone green un-liberated cactus could help. I'm just saying. Not trying to be nasty, just look past the moral of it.
Remember that there are people in the world who would rather openly give to thieves than to see them silk and seethe becoming vicious with hunger or locked behind bars and given to a more criminal spirit. I would rather have someone ask me than have it taken. But if I had to take it, I would.
But, asking IS the proper thing to do.
My ego is insane, but I'm alright
The path of excess leads to the palace of wisdom. -William Blake
Lavos is a fictional character, a dream inside a dream. Don't take what he says to be true or representational of reality in any known form. He is inspired by pure fantasy.