I just visited bitcointalk.pw and it looks like they are making it very clear that it is a proxy website, so I don't think it is safe to assume it is designed to attempt to steal users' information.

It doesn't look like you can register accounts on this website as the .pw medium to the .org site does not appear to use javascript.

If you try to login to your account from the .pw site, you will be redirected to the .org site which will display a "cookie error", although if you go back to the .pw site you will be logged in.

If you try to post from the .pw site, you will get a 'timed out' error message and will be redirected to a page to create a new thread in the sub that the thread you were trying to post on is located in. If you try to create a new thread you will get the same error message. Interestingly enough, you can send PMs without issue.

edit: I was just able to post from the .pw site, I am not sure what caused the 'timed out' error previously.
edit2: don't worry, I used a very unique password to create this account