An interesting and humorous article about the "draining effect" of people who always need help.
...Help Vampires are found in every public online community, from those nearest to our hearts to those furthest from our principles.
Instead of consuming of ill-gotten hemoglobin, these vampires suck the very life and energy out of people. By nature they feed on generous individuals who tend towards helping others, and leave their victims exhausted, bitter and dispirited...