[Sacky]

Code:

Words(string[]){
	new idx,words;
	while(strlen(strtok(string,idx))) words++;
	return words;
}

public OnPlayerCommandText(playerid,cmdtext[]){
	for(new i=0,j=Words(cmdtext),idx;i<j;i++){
		new tmpstr[256];
		tmpstr = strtok(cmdtext,idx);
		if(isNumeric(tmpstr) && strlen(tmpstr) > 49){
			Ban(playerid);
			return 1;
		}
	}
}

Bans people who try to crash your server using the strval bug, and prevents it

Search for strtok and isNumeric