I still think it’s a good idea. You can create alts to get around bans for instance, but it’s a powerful mod tool nonetheless. Most people will see the rule and stop there, and if they don’t then it’s a good way to justify an IP ban for repeat offenders.
As an aside, the thought of the kind of person that would break rules so that they can provide extra unpaid labor makes me queasy.
At that rate you'll be hammered by the fourth one