One potential risk I see would be that Crispr becomes too easy for anyone to do, and someone starts selling dodgy kits that allow for simple mistakes to turn in

One potential risk I see would be that Crispr becomes too easy for anyone to do, and someone starts selling dodgy kits that allow for simple mistakes to turn into complex problems. An extreme outcome might be like the fictional movie "I Am Legend", which was a horrible title for the movie. Someone gets desperate to cure a late stage cancer in a loved one and ends up creating a pathogen that can manage to spread to other people and wipe out a portion or all of the population. Or perhaps someone starts selling kits that "make your muscles bigger", but in 0.7% of the population, that kit also makes the persons heart become oversized. Is it safe to assume that these scenarios are too difficult to accomplish? I am asking because people will do what people can do and we will see online crispr kits before long.