Found this through Google blogsearch - Design with Intent by Dan Lockton. So there could well be more links as the conference continues.

He writes

I’m not sure what my position on the idea of ‘designing safe living’ is, really - whether that’s the right question to ask, or whether ‘we’ should be trying to protect ‘them’, whoever they are. But it strikes me that any behaviour, accidental or deliberate, however it’s classified, can be treated/defined as an ‘error’ by someone, and design can be used to respond accordingly, whether viewed through an explicit mistake-proofing lens or simply designing choice architecture to suggest the ‘right’ actions over the ‘wrong’ ones.

It also seems to that soemeone could describe any words as "discourse" so I hope to find out more about this aspect as well.