I mean, I get it. This will be nigh impossible to codify, such that there will be reasons things can and cannot work in certain situations. This line of attack here, though, is feeling overly forced and would actually sway me to never use such licensed stuff. And I'm pretty heavy on the open source support.
Yeah it's clearly a "recommendation" and people seem to use it pretty sanely.
bash doesn't do it even if you start a subshell. I know I've seen the NO WARRANTY message flash on my screen but darned if I can find a gnu program that does it by default.