What did 1x1x1x1 do

1x1x1x1 exploited a glitch on the Roblox website which gave him access to the Roblox database. This allowed him to ban players, to change place names and descriptions, and to just about anything else on the Roblox website. When Roblox realized what happened, they quickly fixed the bug and banned 1x1x1x1 from Roblox.