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Gollum Killed Frodo's Parents
A Theory That Adds Even More Irony To Gollum & Frodo's Destinies
This theory is one that I can buy into far more readily. Frodo's parents, Drogo and Primula Baggins died about 20 years before the events of The Lord of the Rings when they suffered a boating accident. Little is known about the details of this, but it's confirmed that the couple drowned. This fact inspired the theory that Drogo and Primula were attacked by Gollum, who was looking for his precious Ring.
Gollum is an adept swimmer, and his general history with water makes Drogo and Primula's deaths right up his alley. If the creature truly was responsible, it makes Bilbo sparing Gollum and Frodo later taking pity on him even more ironic. Had Bilbo killed Gollum, then Frodo would never have been orphaned. Then again, Gollum also wouldn't have been there to destroy the One Ring, either.