Builderman was not just a normal Robloxian, he was an Admin (and actully CREEATED ROBLOX!). As he is the greatest and most legendary builder on Roblox. One day he was building a shame with his epic Stamper Tool that places blocks everywhere.
Everything was fine until King Harkinian snuck up behind him and completely decimated him with a Dinner Blaster. Ruigi was there on the scene at the time, but nobody could understand Japanese so no one knew what happened. That is why Builderman is never on the website.
Roblox itself made it so Builderman is friends with every single user on the site, like Tom on MySpace.
Many rumors have been going around that he died.
The UnAnything Team and Sans suspect that there's been a massive anomaly in the timespace continuum that made people start visiting this page a lot. Dunno why.