You may be happy to be able to do bad things to people you do not like, but remember what you are stocking is what you get. When you do good to people, you will get the same thing even many times. So even with the ugliness. If you do no good to others, believe me you will get even more sick rewards.
For that, remember to always do good to others if you do not want to be hurt.
If you do not want to be hurt, then do not start bad deeds on others, bad deeds you do that could hurt his feelings. If you feel you have done wrong to your neighbor or friend, immediately apologize for the relationship back to work properly.