Why all of the negative words over a little bit of hatred? It's just a feeling. Not much effort required.
Man, I gues cheeses is the only one who's with me. I don't waste my time hating people who don't have an influence on my life, just the people who push themselves into my daily activities and try to destory them. These are the people who have nothing better to do than fuck with other people's lives. They should be concerned about their own, not everyone elses.
I also don't sit around and contemplate how much I hate them. Like cheeses said, it's just an feeling, and a very strong one at that. The opposite of hate is like. Is it wasteful to like something?
I guess it depends on how you let hate affect your life. If you let it affect you to the point where you become an incredibly negative person, then I guess it can be harmful. Personally, I consider myself a very positive person.
If an opportunity ever arises where I can get someone I hate locked up, I'll do my best to make sure it happens. I'm sure I'm not the only person who truly hates the people on my list.