Yeah, throwing the incen in the first place was stupid. Very stupid. HOWEVER we've unbanned people for much more, like ghosting. In fact, I remember Fish being unbanned for arming a C4 as an Innocent and killing multiple people on Clue years ago. Setro served his slays, he says it was an accident, I doubt he'd do this on purpose (however dumb his experiment may have been). We have two other staff members saying that he served his slays, and one of them was one of the people burned by the incen. Unban him, or at least reduce his slays and let's move on.
EDIT: Just unban him
EDIT: Just unban him