[mirou123]

There is probably better and more advanced ways to do this but I'll give you a simple soloution.
PS: This is just pseudo code.

Код:

new bool:CanUseStats[MAX_PLAYERS];

In command /stats
{
     if(!CanUseStats[playerid]) return SendClientMessage(playerid, 0x0000FF, "You can't use this command!);
}

In /blockcmd
{
  Use scanf to deal with params, you will need two, the player id and the command to block
    if(!strcmp(cmd, "stats", true))
    {
         CanUseStats[player] = false;
    }
}

You can work based on that now to block any cmd you want.