Currently? It's not possible. It's a planned feature for the new forum software (epochtalk). If you look for Fancy authentication, you will see the details.
What do you mean with the staked address? can you explain, please?
He means posting your address in this thread. If something goes wrong (e.g account gets hacked), you sign a message using that address to prove ownership of the account and wait until theymos or Cyrus recovers it for you. IMO, that's far from being an alternative for a real 2FA.
it is a good idea.lot of spam links about bitcointalk user can be manipulated easily. as a advice to safe use bitcointalk bookmark this site and dont click links and login the website always use the bookmark to login