We have many, many negative ecological/human impacts that have no known cause, that correspond roughly to the time that various kinds of GMO techniques and species came into use.
By that logic, GMOs cause people to be more accepting of gay marriage. We should do research to find the causes of these things, of course, but there's no reason to pick on whatever random tech/group/idea has an image problem at the moment.
the GMO companies have nicely prevented that, by making it impossible to determine precisely when and where different populations were exposed to different GMO species or techniques.
First, we have the US and Europe.
Second, it isn't any different than any other industry - what was the sulfur content of the oil used to make your keyboard?
If the GMO companies believed their products were safe, they would have proudly labeled them.
First, Monsanto et al do 'proudly' label their products, advertise them, even explain in great detail what all their varieties do - but you aren't buying large quantities of seed, so you don't see it.
Second, as long as people are freaking out about GMOs keeping quiet makes more sense than making yourself a target for anti-GMO activists. You really think it makes financial sense to be the only company with a 'Frankenfood' sticker on their products?
But if I could put a question to you - why this tech? Out of the thousand of fairly new techs that go into billions of products, why this one and not, say, cell phone radiation, hormone analogues in plastic, ...?