Marrow has had multiple pardons. Plznate has had multiple pardons. I have had two pardons. And I know others have been pardoned multiple times as well. There are legitimate reasons to have more than one pardon. Sure, what I pardoned for the first time was so minor that I wasn't even banned for it, so I guess you could say I only had one, but I still think the option to have multiple should stay. The reason being is because the nature of the offenses can be very different between two different pardons.
Suppose a user was banned in 2011 for scamming in 2009. He then pardons sometime later after all debts are paid. But then, in 2013, he is banned for creating drama in the community. Should he not be allowed at a later point once he's matured some? It's not like he repeated the same mistake he did the first time, it was for a completely different reason. Sure, if someone pardoned for scamming and then scams again, they shouldn't be allowed to pardon again. But I full heartedly believe that someone should have the right to pardon separate rule offenses (ie plagiarism and then fake vouching or something). Furthermore, why is it so hard for a pardon to be denied by lack of supports from staff if the rule breaker repeated the same crime a second time? I'm against the idea to have barring rules like no second pardons since there will always be exceptions where people feel a person deserves a second pardon, so to avoid dissolving rules to allow certain people to have extra pardon rights, simply have the rules of pardons be very open and then vote no to the cases that don't deserve support. It's that simple!
To summarize-
No support since people can have offenses that are very different.
Just vote no to second time pardoners who are undeserving.