There is a difference between industries that are cancerous to society (of which there are many and very few of us have clean hands at this standard) and open,

There is a difference between industries that are cancerous to society (of which there are many and very few of us have clean hands at this standard) and open, obvious scams. Scams where the software IS the scam and so the software developers involved are culpable. If someone put on their resume that they had previously been employed writing malware then I think it is quite fair to blacklist them too. I get the overall point you are making, but it is just a rehash of the free speech absolutist position which, in my opinion (that you will not change), inevitably and continuously attempts to shield the worst abusers of society. And if it turns out that I end up working on something horrible and don't get out immediately and scrub it off my resume? Then I deserve to take reputational damage