Some rules should definitely be changed, but until they are I don't think staff members ought to be encouraging people to break them--even if they think the rules are futile or unfair or unenforceable.  The rules are still the rules, and when I tag an account that's an alt of one that got banned for plagiarism, I don't want to hear them tell me a staff member said it was OK to have other accounts.  Until the rules change, it's not OK. 

Please, I respectfully beseech you to stop recommending plagiarists create alt accounts.  Even if you know it happens, you are a staff member here and people (especially low-ranked accounts) look to you as a role model and listen to what you say.  Theymos should come up with more rules, different ones, or better ways to enforce the existing ones, but we're stuck with what we've got.  Trusted staff members, DT members, and everyone else shouldn't be encouraging other members to break rules.