And I think that "Do not crash" is a stronger statement than "Avoid crashing"
so I prefer the original suggestion but it's not a big deal either way.
Yes, stronger wording is better. So how about this:
"Do not crash the kernel unless it is absolutely unavoidable--use WARN_ON_ONCE() plus recovery code (if feasible) instead of BUG() or variants\n" . $herecurr);