DELIBERATELY drawing up a play with 12 players is far less strategic than it is STUPID (and flagrantly annoying). Mistakes occasionally happen and cost 5 yards. if they are repeated, after being penalized and corrected, repeated behavior could be considered intentional (and deliberately annoying), which could easily produce an USC, subject to it's own penalty of 15 yards. Should ANY coach deem such a second penalty excessive, additional complaints could/should, earn a second USC, providing ample time to reward such behavior, the opportunity of taking an immediate, and private, shower.
None of this requires a rule adjustment.