Yes there may be people in your life that don't like you *shrug* not everyone is going to like you.
Yes there may be people at your job who don't agree with your method of completing a task *shrug* not everyone is going to agree with you.
Yes there may be people on the street who don't smile at you *shrug* not everyone is happy for you.
These are not haters, these are people to whom your life is irrelevant, a very different concept.
Just to confirm that my stance was correct, I went to the urban dictionary to get an up-to-date definition of exactly what a hater is:
[NB: there are 17 pages of definitions]
All of the other 117 entries are variations on the above. From my tone you can probably sense that I am in agreement with definition 2. When it comes to people liking you and being happy for your success I say *shrug* not everyone is going to like you or be happy for you, and that is their right. The only time that this should ever be a problem is if their negative words or actions have a tangible negative effect on you life. The English language already has words for this, libel, slander, bullying.
I hate (ha!) the word hater even more when it is used to describe a person who has no interest in a particular celebrity. Case in point, my response to the hijaking of all terrestrial television channels by kate and will's wedding. My facebook status made note of the fact that I had no interest in anything but her dress, and when I finally saw that I was disappointed, I thought it was quite boring. I may have also said that from some angles she looked like tiffany from eastenders (who I actually thought was quite pretty at the time). The cries of "HAAAAATER" came in thick and fast. Short of sending a wedding gift, I had no way of quieting the rabble.
When did expressing a negative opinion become hating? What happened to balance? As with many things that are wrong in the world, I blame america. Maybe that makes me a hater? *shrug*