There should be a list of banned accounts together with d2jsp acct which users can see and find the name.
The purpose is if they encounter a new account with banned btag/steam acct then it will be easy to pinpoint that he is scammer in the past using new d2jsp acct.
A rude or any sign of negative behaviour or making you to fast deal can be also be a hint that a user had history of scamming using banned d2jsp and using new d2jsp.
So if there is a masterlist which we can search those history of banned scammer with their game acct (btag, steam, etc) then admin can auto-banned those new d2jsp acct again.
Example is I was scammed by this
https://forums.d2jsp.org/user.php?i=1023123 and his btag is darksoul#2798
A new player deal with new d2jsp acct with btag DarkSoul112 then he can report that this player is using new d2jsp with banned btag game acct in the past.
Then player DarkSoul112 will still not enjoy the benefits of using d2jsp site.