Dr. Humphreys mentioned the reason attempts to farm spiders for their silk doesn't work is because they are territorial.  If we learn anything from spiders maybe it should be that - leave them alone.  Swapping genes from one species to another has too many risks and too many unknown possibilities.  People drink goats milk.  Goats drink goats milk.  Nobody drinks spider webs.

There are just too many questions.  What will be the long term affects on the goats in this experiment?  What if these goats get loose and breed with natural goats?  Of course, we don't know, but this could be an area that should be left alone.  For every conceived benefit, there is an unknown number of dangers.  Just like in medicine, we see new diseases popping up as viruses mutate to get around the cures we come up with.  In trying to fix the problems of the world, we just make more.

Sadly, it seems to be too late.  Once it was started it was too late.  If you ban something in one country, it will continue in another.  We live in a "let's try it and see what happens" world.  Yes, some good has come,  but there is still poverty, war, sickness, you name it.  And it doesn't look like they are going to go away anytime soon.  If anything these things are getting worse. 

Does it really matter if you have a bullet-proof-spider-silk jacket when some one else has a gun that shoots spider-silk-piercing bullets and your sick with some incurable disease brought on by drinking goats milk contaminated with spider web genes, because there is no pure goats milk anymore?