Vault 8166 rumor

Vault 8166 is rumored to be a hidden server on ROBLOX where un-explainable things beyond usual are occurring. It is allegedly a secret map runned by unknown hackers, which have the ability to watch or monitor activity going on between users. It is said that anyone who goes there can gain access to certain information on ROBLOX and use the Installations, GUIs, and programs. It is then used to create new software, bots, or viruses that are placed and hidden into ROBLOX models or plugins. When inserted into a place, they obtain the ability to interfere with gameplay, local scripts, and even computer monitors. However, it is still unknown whether this server exists, and no solid evidence of its existence has even been found yet.

The leaked user story
On 11/15/2016, an anonymous user created a new thread on the Roblox talk sub-forum. This user was claiming to have accidentally gotten onto this "unknown place" while testing out a teleporter for a game. The thread was a brief summary on how "evil is operating behind our eyes", and that there is a place where dangerous people are gaining access to user profiles and other information as we speak. This secret place was referred to as "Vault 8166". A few hours after the thread was posted, word went out. Mysteriously, the thread was nowhere to be found, along with the user who posted it. No evidence has been found that such a thread was ever posted.

Vault 8166 remains a mystery.

Trivia

 * The numbers in the title are the first four numbers of 1x1x1x1's user-id.
 * Vault 8166 is believed to have existed since 2014, although this has never been confirmed
 * The server doesn't have a game profile page, which makes it harder to locate
 * The server has never been found or located by ROBLOX moderators or admins.