I took it as it just had to be someone that the system wouldn't recognize as "wanted". Doesn't really make sense at all, but neither do lots of things in the SW universe.I don't mind him removing the helmet. The rest of the Mandos this season have no problem with it and they said he's part of an extremist cult. But I do have a hard time figuring out why the computer terminal required a face ID to allow use - literally any face will do apparently, doesn't need to be an Imperial officer. I'm sure it was only done to advance a future plot point when Gideon figures out who he is.