Not all petty revenge has to turn out negatively for the receiving party—ever heard of the age old saying "k!ll ’em with kindness!"? It doesn't always work, in fact, sometimes it might make the situation even worse. But it seems that the internet agrees that 99% of the time, it is the best weapon against entitled people. One Redditor shared her success story in using the technique as a form of “petty revenge” and it even has a happy ending! The poster says on the Reddit thread that she didn't h…