Grist also has this up on the companies who don’t want the public to know what’s in their food.

Again, I go back to the often used Bush-era phrase:  “If you have nothing to hide…”  Why would one object to the GMO labeling unless they know that the public is going to stop buying that trash food in droves when they realize it’s GMO?  Or perhaps they’re afraid that people will finally be able to link their health issues with GMO food–gut inflammation, allergies, skin rashes, lung issues, heart issues, etc.?