Nature has been doing the engineering for billions and billions of eons! No regulatory supervision! Wake up PHD idiots! We were all wiped out long ago! What dorks.
My only concern about this is that Nature does not appear to be deliberately malevolent, but human engineers might. If we are learning one thing from all these computer viruses, it is that there are individuals out there who get a kick out of causing harm to other people that they don't even know. God help us when these creeps can make actual disease organisms instead of just computer simulations.