It's very disappointing to me -- who have had to watch both my favorite local bookstore and one of the best NY landmarks both ...
Good taste, of course, for supporting the small, independent merchant over the megacorporate giant.
But good grammar for both knowing that a relative pronoun agrees with its antecedent in person and number and for acting on that knowledge in the face of the knowledge that 99.9% of English speakers would have said and would have expected *"who has" instead of the grammatically correct "who have".
It's time to remember that castigating those who use poor grammar is not enough. It's not even enough to point out that many pedagogical grammatical "rules" are nonsense from a language-historical point of view. It is also necessary to reward those with the courage to practice good grammar in public.
So kudos to smartalec for winning the first (and possibly last) ever "Good Grammar and Good Taste Award". The prize includes (consists entirely of, in fact) a year's free subscription to The Chocolate Interrobang.