I am a software developer, and I probably don't want to work in nuclear energy. The risk of screwing that up is way too high. Of course, people that write software for nukes or nuclear recators - are they that good, or do they just overestimate their abilities or underestimate the risks?
Drugs, including alcohol or tobacco (e.g. eve legal type of recreational drugs) would probably also be out.
Prostitution/Porn - well, I am not sure there is much stuff I like from a software developer view - I don't like server administration, but if it involves user interface design or similar stuff it could be interesting. But I'd would make certain that these are trustworthy companies that don't engage in human trafficking or whatever and the people performing for them would be their because they like the job, not because they are forced or tricked into feeling obligated.
Intelligence Services have a strange allure, but ultimately... I fear that unless I'd turn in the next Snowden, it would mean I have sold out.
I have some doubts that I want to be in the game industry, because I know the fact that so many talented people really want to work there is used without shame to make people work crazy hours. On the other hand, maybe it would really be worth it, it's not like I have kids, a wife or a girlfriend or actively pursuing any of that.
I'd probably also not want to work in the oil industry.