This is what you CAN do. You can check port 21 or 22 of the server. If either of them are connectable, then you can try something neat. Port 21 and 22 are the FTP and SSH ports. What you can do is crack these through brute force or some other method, then you pretty much can edit what is on the console. You can change the ops list and add your IGN then tell the owner to restart the server for some god damn reason. You should be opped. I don't have any FTP or SSH crackers as of the moment.