Not to worry. The term "haters" has come to mean negative people, or complainers, and so on, as a more general term than just actual "hate."
Also, the good old ignore button can be used however anyone wants to. It was never just meant for screening out mean posters. Someone could also use it to screen out the posts of someone that you might have learned is just negative all the time. It's totally up to the user how he or she wants to use it.
I completely agree with you Homegirl. The term hater is a slang term used to identify those who are negative and discouraging to others. Also someone who has a strong dislike for something or someone.