Multiple users per household

The guidelines naturally say no multiple-accounting. I was wondering what would happen if multiple users played from one household - I assume from a dev perspective one would only see accounts active from the same router IP / location and not down to the physical computer address. So how are you addressing this problem?

To become more concrete, my roommate is very interested in this game and I’m trying to get him to join, I just don’t want to get us banned.

Don’t worry, you won’t get banned!