no difference to you nor me really.
Then I see no reason to keep the rule active.
Because an army of imbeciles would attack the user once found out.
For what purpose?
And in this instance, if the user is found out, this is irrespective of whether the rule is implemented or not. Any retaliation against the activity would be that of a community action. In this case, I would rather know the public alternate account linkages between identities rather than create an incentive for people who do in secret.