Andrej K makes an interesting point and Autism Capital's dismissive reply is wrong.

It is rational to be more afraid of man than of nature, because it is rational to be afraid of powerful optimizers.

This is also often why we are more suspicious of for-profit versions than non-profit versions of the same activity.

This is a virus vs poison type discussion

I think “executable” should be reserved for code-like things. One test is whether the response is strongly dose dependent. Code copies beyond a few have no extra effect but more poison (or bullets or laser power) kills you faster. Language is in-between.