I guess I lean towards the idea that people splicing genes of anything in their garage is a little scarier than exciting...however, what are the odds that they succeed? Or fail and release a super killer bacteria?...I don't know, but probably not good.
I do agree with the argument that without knowing what is "impossible", they may make an incredible discovery...but that may just be wishful thinking. I mean, I wouldn't complain if I knew my yogurt was poison if it glowed green, but I'll probably still use the sell by date as a fall back.