There was discussion about it in the past but seems theymos didn't take care of it.
All you need currently to keep your account secure is very good password. There was a fact of hacking famous members too. I remember how condoras sent btc to one member (can't remember username) and lost it because account was hacked and real owner lose control on it. Condoras trusted blindly and didn't ask for signing a message. (I talk about loans)
Btw real way here is signing a message from your bitcoin adress which must be actively used here and then you need a lot of wait to get response on your pm from moderator, usually from Cyrus. There is another way to prove ownership if you can't sign a message but that will take a lot of time and won't worth for it (messages and etc for example).