What biology will be able to to that computers aren't is to directly kill people, without detours over miscalculated radiation doses or decompression times for

What biology will be able to to that computers aren't is to directly kill people, without detours over miscalculated radiation doses or decompression times for divers. Well meaning hobbyists in their basement will probably not endanger more than themselves and their immediate friends and family, but the same technoilogy in the hands of fanatics will open interesting venues for non-standard social interactions.