Yes, GMO's are great and here is why...

[hunter]

46. Some are, some are not.

Some of the mushrooms in the forest are good to eat, and some will kill you.

Genes for herbicide resistance or a single poorly moderated pesticides are a bad idea in the long run.

Natural insect and fungicide resistance in plants is a much more sophisticated process then "let's just throw these genes in there." Most naturally resistant plants will increase production of a wide range of natural pesticides when they or their neighbors are attacked, and decrease them when few pests are around. This reduces the chance of resistant pests evolving.

After bee and butterfly populations are destroyed by your GMO crop, sooner or later you get a pest that eats your GMO crop with impunity, and furthermore you've killed off all that pest's less damaging competition, and maybe a few of its predators too.

It works in a similar way with GMO herbicide resistant crops. You end up with weeds that are as resistant to herbicides as your GMO crop is.

Every GMO crop has to be thoroughly examined on a case-by-case basis to determine if the modification will be beneficial or detrimental in the long run.

I think most GMO organisms (and even most patented organisms overall) are not beneficial in the long run, for the simple reason that selling them reduces the overall genetic diversity of traditional crops. There are genes in "heritage" crops that might not be around when we need them if most farmers are growing patent crops; genes that could be very useful someday as the climate become warmer and less stable and new pests evolve.