If you have a small comunity and you are not a server from Argentina no one will pick on you so don't worry too much about that. You can see those who are problems are normally from argentina and that is because the owner of a realm called infinitum (also from argentina) is a slicky bastard who used to cause all this shit, cyborgplay and me can confirm this (Feofilaktt I'm sure you know too). Code blocking too much is a bad idea idea too as that code interact more in game too, besides there are a lot more exploits in this game that I will not name here, the hex code is only one made public long time ago but there are atleast three more much worse than that and hope will never be public.
Exactly! Unfortunately no one cares about helping the Diablo 2 community. I even saw some servers with the solutions, editing the D2GS source code or blocking the exploit with "warn" without interfering with the game.
But all this was done by them, do not think anything ready to download
They do not share with us and in return they are immune to the most common attacks.. but not at all.
As I said, there are several ways to topple the D2GS process, either by flooding or packet switching. Our beloved marsgod stopped supporting the D2GS tool and we were without adequate security for the process.
Our friend Tesseract has, in theory, developed the perfect tool for attack problems, but so far no one has succeeded or made the solution available to make it work.
As you said, everyone already knows the great villain of this story.. if all server owners are aware that players for all servers, we would not have problems like this.
Added: 18.10.2017 11:57
Note: I have also received many attacks from Bulgarian.