Have a F class JFK-NRT issued by Emirates. (Going on to SIN & DXB) Looked at EF and showed one seat taken, 6 seats blocked & 1 seat avail which is a middle seat & I don't want it (can't sleep unless at a window so would have gone as far as changing the flight to JL). Called ANA & at first the agent Told me only the middle seat was avail. I pointed out that ALL seats were actually avail, and asked him to explain why they blocked EVERY (all 4) window seats (EF showed F6). After 10 min on hold I had my window seat. I can understand airlines blocking a few best seats for Elites (however IMO it should be Elites OR FULL FARE) but some airlines are getting crazy w blocking so many F seats FOR NO GOOD REASON. NH, OZ block half the F seats or more & even EK has started blocking 1&2A on the 380. But I've found a polite but firm phone call usually releases the seat you want on all 3 mentioned airlines