People on the streets: Are homeless people just shiftless and lazy, or do they deserve our help?

I have read a few questions on this site regarding homeless people, and thought I would bring up this question. Understandably it may have already been asked many times before. I know I have my own opinions on this matter, but I am curious as to what the majority of flutherers think, those willing to share their opinion.

Many people have said to me that they think the homeless are lazy and do not deserve a donation, since they will use it on booze or narcotics, anyways. Others have a more compassionate viewpoint, but are similarly guarded about handing over their hard-earned money since they suspect the money will not go towards survival (ie food, shelter, clothing). Have you had an experience with a homeless individual, and if so, what thoughts did you come away with from that experience? If you have not, what are your impressions of homeless people? If you have been homeless at some point in your life, what are some things you would like others to know about people on the streets? Thank you for your comments.