[ethbro]

> I can imagine a lot worse than that.

From the RadioLab podcast linked above (excellent, btw), far more frightening in the long run: introduce genetic changes to the reproductive cells.

... which then automatically become part of any offspring.

... which are then automatically inherited by any subsequent generations.

And, new species.

[ChuckMcM]

I totally want the gene to control metallic objects :-) But I agree with you, at some point you will have to ask what species is this? Are you human or something else? I expect CRISPR to show up in athletes first, high risk/high gain and difficult to claim cheating.