Earlier quoted context omitted.
Reminds me of the NET SEND command in windows 2000-xp. Allowed sending a popup text message to specific (or all with a wildcard!) machines on a network. Sure there were times where such a feature would be convenient ("server going down for maintenance, please save your work", etc), but overall ripe for abuse. They disabled it in a service pack and took it out altogether in subsequent versions.
Back in my senior year of high school during Spanish class I naively used NET SEND to send a message to one of my classmates. The only problem was that I failed to specify the user in the command and instead used *. This ended up sending a message to all computers in the school district. I remember the computer administrator coming into the class saying “Are you aware one of your students is sending messages to the e…
The professor classified me as the annoying kid, until I surpassed his expectations with the first programming excercises :P