No it won't. Unless you have obligations.
> Along the same token, you obviously shouldn't steal from the non-profit, or say randomly beat up the customers/clients.
That's unrelated, to say the least. You obviously shouldn't steal from anyone nor beat up anyone, that's not related to this specific case at all.
> Just because you are doing things for free does not mean you don't have social responsibility for your actions.
No. No one forced the society to use the work that somebody was doing for free. And if society decided that it's fine to use it, it's on the society to take the associated risks. Everything else is a good will of the maintainer.