I think it's more useful than harmful. It can be used by terrorists, but terrorists usually don't have high-tech labs capable of fitting together thousands of pieces of DNA. If terrorists wanted to, they could also nuke the world, but similarly, they don't have the tools to create nuclear weapons.
There is always a risk, but consider how useful these life-creating tools could be. We could nearly instantly create vaccines, we could use this for many beneficial things.
And sean2323, I totally agree with you. Religious "arguments" don't belong
anywhere before the imaginary friend(s) in it is(/are) proven to exist.
If they wanted to stop the research, they should find some arguments that apply to reality.