Does it ever bother you when someone says they 'hate' someone they don't know?

Lots of ‘cool’ teenagers like to say “I hate Justin Bieber” or Hannah Montana, or your choice of celebrity, often calling them things that are less-than-pleasant.
For some reason it bothers me, just because I don’t like someone’s music or acting I wouldn’t announce how much I ‘hate’ them or call them derogatory names.
Anyone else feel this way?