You also can't "auto-ddos" someone. DoS takes one computer, and it's just sending packets high in bytes to one computer, from one computer. You can do a small one without any large effects in the Windows command prompt. A DDoS is distributed across multiple computers, rather than having one to send the packets. Say one computer pinged another computer, non-stop, with... say, 1 megabyte. You must send the one megabyte, probably every 100ms. They must send it back to you, increasing their network use. Multiple computers doing that can disconnect your internet completely, although, nothing like that will make a black screen. There must be some object the client can't load in PVP servers, which causes a client crash - black screen.