The Cult was originally formed due to boredom, and the desire to kill other Scottland members for fun.
Anthony and Kate founded the Cult, building a small sacrificial altar outside the Scottland Welcome Center, where Brock was the first sacrifice made with mmp2011 and NinjaMarion briefly joining the Cult at the time.
The Cult Symbols were first placed by Anthony in various places around Scottland in an attempt to make Zack nervous. Kate also placed various signs with hints about the cult's existence around Scottland including in Zack's House.
The sacrificial altar was later relocated and updated on top of Anthony's Pyramids and was built as a joint effort by Anthony and Kate. Unfortunately no sacrifices have been made at the new altar yet.