Just a few fun scripts a friend and I used as teens in our computer sciences course to troll others, revised using my current knowledge.

• Annoy.cmd starts a new instance of itself, then closes the current one.
• HardKill.cmd opens new instances of itself in a loop, each instance again opening new instances in a loop.
• Matrix.cmd starts a number matrix with rapidly changing random green symbols on a black background.
• Open.cmd opens a YouTube video.
• ShutdownDefense.cmd constantly tries to abort a scheduled shutdown.
• SoftKill.cmd opens new instances of itself and stays open afterwards.
• SuperAttack.cmd starts a shutdown on specified remote PCs.