Apart from pure joy, I've always found strong emotions to be a little bit scary. Strong hate tends to run deep, is irreversible, and is capable of creating damage which cannot be fixed - all as a result of a few wrong words that are said. Silly, isn't it?
Few people in the world actually gain satisfaction from hurting others: these people need to be avoided at all costs.
In all honesty, where does hate get you? Nowhere! If you are the type of person to express dissatisfaction over everything, then you will bring people down; nobody likes this. If you spread rumors about others for your own personal gain, then not only will people not trust you, but they will question your intentions and you will repel them.
Angst and apathy may seem trendy, but happiness, honesty and respect are traits that people want to have in their lives. Please bring these. If someone has done you wrong, then don't let the entire world know; make sure you deal with the person directly, and make sure the other peson does the same. This way, the problem doesn't have to elevate into something far worse that it could be. If the whole world ends up knowing, then you are honestly making everybody suffer. People will make judgements that they aren't qualified to make (considering they will most likely be hearing one side of the story). I've experienced this at its most intense existence: not worth it.
Likewise, if you try your best to bring the most positivity, it will be reflected in your quality of life. You will experience the most happiness that you have ever experienced, and those that are close to you will reflect this happiness. Of course, people may get hurt when necessary, like during a break-up or when somebody is laid off from their job, but this is just life, not malicious harm.
Please, do me a favor, and stop talking shit about other people. It's a sign of weakness, and it's not worth the results. If you don't like somebody than you can keep it to yourself. Our planet has enough conflict, we don't need to add any more.