I never understood why people got so up in arms about GMO's. Personally I think it's pretty cool stuff. Is it just because it's not 'natural'?
FOr me, it's because they aren't necessarily being created for the benefit of the consumer.
One example: Round-Up ready soybeans (GMO soy created to be resistant to Round-Up chemicals so that they can be sprayed on the field without much care). Not only are they made to be R-U ready, but they are made to be sterile, so farmers who traditionally have saved seeds from one harvest to plant in the following year can't. This especially affects poor farmers and those in other countries. And in case some of the seeds are still fertile, farmers who buy R-U ready soy have to sign an agreement that they will not save the seeds.
Monsanto has even gone after farmers living NEXT TO fields who have R-U ready 'volunteer' plants growing .
Also, the R-U ready soy are created by combining genes from soy, a (petunia? some flower), a virus and a bacteria. Who knows what affect that can have on the body?
As Jay said, GMO foods don't just affect the fields they are grown in, but can royally mess up the environment. They can cross-pollenate with other plants (like the weeds that farmers don't want) and cause super weeds (just like taking antibiotics can produce antibiotic-resistance in bacteria in our bodies, this cross-pollinization causes chemical-resistant weeds. Just recently, I heard a news story that many weeds are now becoming resistant to Round-Up. Which makes the GMO soy that is resistant to it pretty useless!).
Good old fashioned hybridization (someone noticing good qualities in plant A and plant B, and cross pollinating them) is one thing, but when scientists start messig with mother nature (especially when it's mostly for corporate greed) they often go too far.
I believe in disclosure to customers, which isn't being done. While manufacturers have voluntarily labeled products "GMO-free," there is no law requiring GMO products to be labeled. And I think most Canola (?) products that aren't otherwise labeled, for example, ARE GMO.
FYI: You can check for GMO fresh fruits and veggies by looking at the number code on them. If it starts with "8", they are GMO. (If it starts with "9" they are organically grown).
Just another reason to choose organic, which can't be GMO, or irradiated.