Didn't get the job because I like horror movies?

[Snippeh]

The whole point of interviews etc is to judge whether a person will be suitable for the job. If he had plain out stated that it was because you like horror films, you would be able to fight that, but not having the same interests as an organisation is pretty standard fob off.

Also, by putting your profile on Facebook with public settings gives absolutely anyone access, including future employers (and most do check these days) so probably best to whack the private settings on in the future.