For example, someone who attends a sub-cultural event (like a hardcore gaming festival or a cosplay event) with an ironic/humorous approach, versus genuine enthusiasm or interest.
The word I'm looking for isn't a voyeur—as a voyeur is someone who gains pleasure out of this third-party experience.
I keep thinking of exhibitionist, which I know is the opposite of what I'm thinking of. The word exhibit captures the essence, though—the distance/lack of empathy is critical.