I think the key issue is an Interceptor is still an Interceptor regardless of the colour scheme. A TIE painted to look like a TIE/fo is NOT. Those two types have different characteristics, and the confusion caused would be unwarranted.
Personally, I think painting your regular TIEs to look like TIE/fos is an absolutely stupid thing to do, specifically because it's confusing for other players.
But there is no unwarranted confusion.
Is it unwarranted because the TIE and the TIE/FO look the same have different shield values? So do two X-Wings when one has a shield upgrade.
Is it unwarranted because the TIE and the TIE/FO look the same but can select different maneuvers? So can two YT-2400s when Kannan is riding in one of them. So can Cowell flying next to Jax. So can Juno flying next to Bren.
The game is designed to have players look at the tiles, and their opponents cards, to distinguish between ships. The models are not meant to be the distinguishing factor. So, while the feeble minded may find themselves confused, they will not be any more confused than they would be from just playing the game in general. This is why, even if we entertain allegations of confusion, that such confusion is not unwarranted.
