What specifically do you disagree with, or consider flawed logic, or ridiculous?
1. Pick a human at random, you have no information
about their character.
2. Hurting people is bad.
3. It is possible to unknowingly hurt people, which does
not reflect on moral character.
4. Learning that you are hurting people, and then continuing
to do so is morally bad.
5. Learning that you are hurting people, and then stopping
is morally better.
6. Therefore you have more information of good moral character
about someone who has learned that they are hurting people and stopped,
than about the unknown person in 1.
7. It is not reasonable to expect every job seeking person to know
about every company reputation, or the crypto miner management might
ask them to work on at some point in future.
8. Working at a company involves learning a lot more about what they do.
9. Learning that what they do is hurting people, and leaving,
is more evidence of moral goodness than you know about
an unknown random job applicant from an unknown previous employer.
Or, alternately if you don't disagree with any of those, perhaps you disagree with the idea that someone could work for Norton not knowing in advance they would be harming people, so that counts as morally bad. Then you either think "hire morally bad people" or you agree with the root claim "remember don't hire Norton programmers".
If so, then you disagree with the parent commenter's "everyone has the freedom to get another job" because if nobody should hire them, they don't have said freedom.
1.