As a previous poster said, whether they are a porn actor/star or a just a regular person, (ie: non-porn actor,) what differance does it make if it's just hooking up for sex? Relationships could be vastly differant, but the OP asked about sex, not relationships. As has been stated, porn actors get tested more often then most regular people so, in reality, they are probably a safer bet as far as STDs go. lol
Now, here are some related questions. What's the differance between a porn actor and a porn star? Also, what constitutes 'sex' in this case? I fooled around with, (sucked his cock a little bit,) a guy who was in one porn flick. Recently, at a naked party I hosted, I sucked the dick and ate the ass of a guy who has been in 4 vids. Are either of them considered 'stars' or was what I did even considered having sex? lol
I think there are some actors who are 'stars' because they have done a lot of vids, Brent Corrigan having done qite a few and Denis Reed, (my all time favourite,) having done tons of all kinds of vids. But I'm not sure someone who has only done a couple flicks is really a star in any sense of the word.
Finally, Yes, I would have sex with someone who has or does porn videos, and there are a few I really want to. Besides those mentioned already, Sean Storm comes to mind rather quickly.