...in the porn industry? Not necessarily as an actor.
Sure. Nothing wrong with sex, or with filming it/taking pictures. As far as acting/performing, I'd be leery for health reasons, but with the right people (e.g. amateur porn with friends), why not?
Yeah, but I'd rather not. It's one of the ultimate jobs for coming across as sleazy, whether you are or not. (Yes, even moreso than being a porn star IMHO.)
...as a drug traffickers?
Oooh, I guess this one depends. Slinging weed or psychedelics in a situation where I was confident that I wouldn't get caught or face any repercussions? Sure, maybe. Building a meth empire? Hell no. As a rule of thumb, I'd be very uncomfortable dealing drugs that I won't have around me (you brought some pot over? no biggee; but you bring some crank or heroin into my house, and you're leaving as soon as I know about it). Not all drugs are the same.
Erm.... speaking of sleazebag jobs... but yeah, if I had to, or if I was working to better the country (or state, or city, or whatever). This is another "rather not, but reluctantly" kind of job for me.
Only if prosecuting a war I believed in; generally speaking, a defensive war (either in defense of my country, an ally or human rights in general, and that last one is almost never the real reason for a war). Otherwise, no; a soldier must fundamentally be ready to kill on command, and that's not a position I ever want to be in.
Big fat nope. I don't have a problem selling tobacco (though I find it generally distasteful), but I can't imagine taking a job where I'm working in an industry more duplicitous than politics.
... in the Hollywood movie industry?
Sure. Why not? I'd even flap my testes at the paparazzi.