Difficulty Rating: Varies
Methods:
Idea: Ping flood the target.
Problem: It's distructive at both ends. Requires you to have a big connection to the internet. Can be traced. Long boring meeting with department head.Idea: (Smurf) Send a ping packet with a reply address. Watch buggy O.S. do stupid things.
Problem: Too many packet filters. People upgrade the O.S. (slowly). Only works as long as you keep sending. Can be traced.
Bonus: At least it doesn't hurt your end of the connection.Idea: (Teardrop) Send an impossibly long ping packet. Watch buggy O.S. crash.
Problem: Packet filters. Most O.S.'s (except Win95) have been upgraded.