Hello,
I always get annoyed when a player with average ping of ~1000 joins server. Even if he soon gets kicked by exceeding the ping limit, he manages to lag the server and it ain't fun.
So, I suggest that there should be a new feature in the current ping limit system. This is used in many other internet games such as ET and so on...
If the server recoqnizes that a player tries to join with huge ping, it will block him that he wont be able to join unless he manages to drop his ping. Then there should be a message shown to the player like "This server is for low pings only" (which is very usual info-message) or something like that.