Key points from article :
With cheaper equipment citizen-scientists are attempting to re-engineer DNA.
The do-it-yourself genetics revolution one day may go catastrophically wrong.
Worry that someone will use the technology to create a bioweapon.
Researchers has recreated from scratch an extinct relative of smallpox.
A site called Science Exchange serves as a Craigslist for DNA.
Laws that cover biotechnology have not been significantly updated in decades.
The study was published in the journal PLOS One.
