there can be other verification methods too. but I think this method is best because it is also decentralized. i see this forum has KYC option also. maybe this Is the method admins here using
For teleported account if there’s ever an hack, admin could simply verify that you’re the owner of the account by asking you to place a specific information on your Bitcointalk profile (since both account has the same username) before the recovery will be done.
You are right with this, but about those that are not teleported? How then will they get their account back in the event of a hack aside from email and so?
I think admin should find a solution that will he general, that is, a solution that will work for both teleported and non-teleported users, one group of users shouldn't have a special privilege that is not available to the other users, we all are equal users as long as this forum Is concerned.
And speaking about signing a message with our bitcoin or altcoin address, forgive me if I am wrong but I do not think that bitcointalk had this facility as an official feature on the forum, i think a user created that thread, and due to the patronage on the thread due to how popular and important user's took it, theymos then decided to start using the message signed on that thread as a criteria to recover stolen or hacked account for users who are victims.
We can replicate and do same here as well.