Yes, and it always ends up biting me in the a$$ :|
I installed a wireless network in a client's house for free. He added a new addition and now complains I did crappy work his network keeps dropping (he never mentions the 4 additional walls that were put in between the router and the PC though).
Someone left their tailgate opened at a Toys R Us last week with a rear cab full of gifts. I closed it, and the lady came up yelling to stay away from her car (she thought I was trying to rip her off :| )
I let a lady get in front of me in stopped traffic. Her rear bumper clips my front bumper, taking off a chunk of paint, and she never ever stops
I could go on and on. I gotta stop being the nice guy because everyone starts depending on me. I'm always the one that gets calls for favors, yet I never seem to need anything from anybody.