This is a modern evolution of the "cursed cartridge" trope. Just as Majora’s Mask had "Ben Drowned," Minecraft and Roblox have their own pantheon of haunted users. The keyword often appears in forums where users share screenshots of corrupted terrain or strange chat logs, attributing the chaos to this specific entity. Whether "samisdead12" was a real user engaging in elaborate trolling, a hacked client, or purely a piece of fiction written by a creative storyteller, the result is the same: the blurring of lines between the game engine and a ghost story.
The most likely explanation for the persistence of "samisdead12" is its role in an Alternate Reality Game (ARG). ARGs are narratives that use the real world as a platform, often involving websites, phone numbers, and social media accounts to tell a story. samisdead12