Actually, one other good way is to try and be clever, but ignorant at the same time. This one trick sinched it for me. When I was in HS I was working at the library as a class. It was a light day, as it was everyday, so I decided to look up some pranking on PCs. I've already learned the basics, so when I came across the net send command, I was excited at what I could do with it in a LAN enviroment. Well, being typical, I got on a PC and entered net send * THE LIBRARY MAN IS WATCHING YOU. I put that because our librarian had a program to spy on the PC's at the library, and remotely control them. I sent it out, and to my surprise, it went out to EVERY SINGLE PC in the network, with the exception of the main office's PC's because they where on a different network. The router stopped the flood, just not within that LAN. It was awesome, I fessed up, and the admin just laughed. It was there that the relationship opened up, he lessened my restrictions. NET SEND is disabled in SP2, the Messenger service is disabled.