Hi at all 
Ok, here is what I am suggestion.
Resently I have noticed alot of people complaining about getting keylogged, loosing acces to their d2jsp account, and since I personally feel like i spend more time on d2jsp, Than actual gaming / Facebook / Etc. i would like myself and hopefully many others the security abitt higher
Of cause it would be completly "Optional" to have a Autheticator or not. 
The way an authenticator works is u need write in 5 - 10 random numbers if ur logging in from several different locations. Uselly the good autheticators remember ur last log - in point ( Ur home mostly ) and saves it so u dont have to write a code everytime you log on.
The Autheticator would prevent people from getting keylogged, and no1 would be able to acces your account unless they have the actual authenticator or log on from your computer :p.
An Autheticator could be the kind that cost money to get make ( another way to pay/donate to jsp ) Here where i work it cost roughly 100 $ for 1500 Autheticators (Company discount ofc
)
Or you could do like "Blizzard" and make an App for it
( For Iphone´s)
The App thing is very simple, and easy to understand
Lmk What you think, it would be a optional add of couse as mentioned earlier