Well, not all arguments against GMOs are stories. I'm thinking specifically of Taleb's argument: http://www.fooledbyrandomness.com/pp2.pdf
Best resource on GMOs remains this Grist series: http://grist.org/series/panic-free-gmos/
I say this having read and enjoyed three of his books. b^)
GMOs might open the door to some very unlikely but potentially devastating events.