If anything is being added to rules, I think something along the lines of:
You may be given small temp bans, from 1 to 24 hour(s), if your behaviour is extremely disruptive and we feel that giving you a "time-out" is the better course of action to warnings or infractions because of spam and other content.
But I need to remind myself what's already in the rules being a new mod, so I'm not even sure if this is already something listed.
And I also agree with the common sense thing. I've always been for the golden rule being "don't be a dick", but I understand some of the memberbase prefers things related to consequences being listed in the rules as well. So, for example, if this situation did arise and someone was given this "time-out", when they sobered up they wouldn't be pissed and say "hey what was that all about why didnt I just get infractions".