Well, just... I mean, I guess there's no problems with collecting merchandise, but I probably wouldn't go around harassing folks if you recognize them from your entertainment, since they probably don't realize they're famous somewhere, and might not appreciate the reasons WHY they're famous.

Sorry to be a killjoy, it's just... well, we used to get this sort of thing back home, and it'd freak out a lot of the new folks. The guy who ran the bookstore near the waterfront was rumored to have actually thrown a book at the head of someone who wouldn't leave well enough alone, actually.