Fake votes

http://www.imdb.com/title/tt1251757/ratings

22,208 IMDb users have given a weighted average vote of 6.8 / 10

Demographic breakdowns are shown below.
Votes Percentage Rating
661 3.0% 10
584 2.6% 9
1,492 6.7% 8
2,274 10.2% 7
1,507 6.8% 6
7,961 35.8% 5
1,441 6.5% 4
374 1.7% 3
4,699 21.2% 2
1,215 5.5% 1

Arithmetic mean = 4.8. Median = 5

I have never seen something like this. It looks like most votes are fake.