My ideal way to annoy a celebrity would be to identify the project they wish they’d never done and “recognize” them for it, and for nothing else.
There are rules. It can’t be a student film (“A Certain Sacrifice”), or a strictly softcore porn (“Party at Kitty and Stud’s”) that you would not have seen in the course of your normal life had the actors not become stars. Those of you who saw either of those prior to Madonna and Sylvester Stallone becoming stars do not have normal lives. The ruse must be semi-believable.
An example: 2trew is walking through an airport. Off to his left he sees Tom Hanks. He looks, looks again, takes a couple of steps forward, looks again, generally does the starstruck thing and the approaches. “Oh, oh my God, you’re that actor!”
Mr. Hanks, having been in “Saving Private Ryan”, “Castaway”, and a whole bunch of other worthy stuff, begins his “Aw, shucks” routine.
2trew continues flapping and looking like a totally overwhelmed fan who can’t speak yet, then blurts “You’re that guy from ‘Bosom Buddies!’ Oh wow, I can’t believe it! What’s Peter Scolari really like?”
Gush further, get an autograph, ask constantly about the co-star who did have a nice long run on Newhart and would thus be theoretically recognizable, and depart.
A reverse form of this would be to recognize a long term and successful television actor from their brief movie career. Extra points if it’s Lea Thompson and you claim to only have seen her in Howard the Duck.
They’re theoretically rich, they’re pretty sure they’re famous, they’re fair game. How would you annoy a celebrity?
David Hasselhoff is, of course, beyond the scope of this exercise.