Utopian

The Utopians were the Humanoid inhabitants of the Utopian moon. Once existing in a state of bliss and peace, the residents of this world lived in a small colony near a water source. They were invaded by a Goa'uld whose only real ability to control them lie in the consumption of their food. It placed a foreign agent within the plants, which the people consumed, and eventually became so paranoid that they destroyed themselves.

Trivia
Though it has never been proven, the Utopians may have been Furlings, as the technology that transported colonists to the moon from the nearby planet was Furling in origin.