Not alot you can say if it is a very bad replica. If it is a bad replica like that, I don't hink there is much else that can be said!
It's very hard when someone is wearing a blatant fake. I have a friend who wears a Breitling Bentley canal street special, I try not to look at it, because if I get caught I don't want to get into a discussion about Breitlings. Another friend of mine also wears an asian PO, maybe 3rd gen, and he passes it off as genuine, I just go along with it, as a close friend to me, I haven't the heart to call him out.