my question is. Can that 99% perfect copy be able to allow users Log in with the same information from bitcointalk? If Yes then as what OP said it can be used by scammers.
It's not 99% the same and even it is the same visually, I am doubtful that it can be appeared on top of Google search results even I know that Google are shady with allowing scam and phishing sites appears on top.
It's only about visual appearance of a scam and phishing forum but technically, it will be never the same because the Bitcointalk.org forum is modified a lot by theymos over many years for improving its security after several forum hacks.
Bitcointalk history of hacks and vandalism (in 2011, 2013 and 2015).