Yes, exploiters should be banned. No questions.
But is a person that gets a nano aid duped in a server crash an exploiter? Funcom stated to Demios that the item that got duped was unimportant. Well, would you spend your time duping firstaids and useless items if you were exploiting? Or does it more look like something that happened in a servercrash? It is legal to use your brain and common sense when looking at these issues.