The classy way to beat a far worse team is to open up the rotation but remain serious. This may be the first time your rookies get any PT - teach those rookies to play well, to play hard, whenever they step on the field. Also, it feels shitty to get stomped on by a bunch of goofs; if the teams were reversed would you want your opposition to be letting the thumbers fly at 12-5? No, you'd want to be taken seriously.
If you can't use a blowout to improve yourself, you need better coaching.