Over 12,000 users on Reddit responded when asked what the moment that broke their ability to serve other people without being thanked or respected for their deeds. These people were walked all over without even a thank you for their service, so it changed how they thought about doing charitable deeds in the future.
Whether it was a beggar who just wanted more or a neighbor who borrowed so much that it should be considered stealing, these people were all taken advantage of for being helpful, so they decided to stop helping out at all.