I don't know why anyone would look askance at someone reading to an 8-month-old. Don't most people read to their babies??? I'm sure it's generally recommended.
Most babies/toddlers I see in restaurants are happy playing with toys. Ours throws all his toys on the ground but would sit still for books.
I would not do flashcards with a baby (or any aged preschooler) unless the child asked me to, because my philosophy is that kids learn best through play and observation...so I would never drill or quiz a baby (or preschooler). JMHO.

We did it initally because of DS' eczema. We continue doing it because they entertain him and it's easy to do after a long day at work. For the record, I don't drill him, but I am curious if he knows the flashcards or not. But your points are well taken!