Ultimately the aim is that this license be adopted by software developers are concerned with how our code is used.
We strive to make the license specific and broadly adoptable so that individuals and organizations can use code under this license without fear of unnecessary or punitive enforcement.

(from the README)

It would be really useful to have the NoHarm license combinable with existing licenses.

Consider using a similar format as the Commons Clause. This could also be an additional alternative formulation next to the existing one.