Notice that the real bitcointalk link appears in green when clicked in the forum.
If you are looking at
green lock to identify the real and fake then you are wrong. Any domain owner can by SSL and add it with their domain to show it's trusted.
The best practice is to bookmark the site and make sure you do remember the correct spelling. Also you will need to remember which TLD (.com, .org, .info etc) the domain have.
Another practice is to copy the root URL and paste it in a notepad. Whenever you need to visit the site, copy the URL from notepad and past it on your browsers address bar.