If Kindness is a weakness, then I'm a pretty weak person IRL. But, having said that, I'm in agreement with Callaway and PI. In the past I would be too susceptible to being exploited by someone who would take advantage of my willingness to help at any time. I'v learned to draw limits and set boundaries. But, it doesn't hurt to be polite and practice random acts of kindness, no matter how small or if you do or don't know the person(s) your being kind to.