I have nothing against additional security if it is something that is technically relatively easy to implement - and we recently got that feature on the BTT forum. For me personally, something like that is not necessary because I feel safe even without it - but for those who have poor operational security in the sense that they use only one e-mail, weak passwords (or even just one password for all services), and connect to public wireless networks, any additional protection is welcome.
As for phishing, it is very easy to protect yourself - simply save the forum link in your favorites and always access it from that link.