[Threshold]

pawn Код:

public OnPlayerTakeDamage(playerid, issuerid, Float:amount, weaponid, bodypart) //Remove 'bodypart' if not using 0.3z
{
    if(issuerid != INVALID_PLAYER_ID)
    {
        if(GetPlayerState(playerid) == PLAYER_STATE_ONFOOT)
        {
            if(GetPlayerState(issuerid) == PLAYER_STATE_DRIVER)
            {
                if(weaponid == 49 || weaponid == 50)
                {
                    new Float:x, Float:y, Float:z;
                    GetPlayerPos(issuerid, x, y, z);
                    SetPlayerPos(issuerid, x, y, z + 5); //Slap the carparker
                    GetPlayerPos(playerid, x, y, z);
                    SetPlayerPos(playerid, x, y, z + 3); //Slap the player so they are no longer being carparked
                    SendClientMessage(issuerid, -1, "Carparking/Ramming is forbidden on this server.");
                }
            }
        }
    }
    return 1;
}

There are probably better methods than this and I'm not saying mine is the best alternative, but this code should have some effect.