Can you spare some change?

It doesn't happen to often, except around the holidays but it really pisses me off. People begging for money. Don't get me wrong I understand that hard times can fall on any one especially these days. What I am referring to are the people that try to scam you, most of the time you can tell the difference. The person who begs day in and day out sometimes and different locations through out the city (example same lady begging for money at different wal marts in a city) or the people who are stranded at the grocery store cause they ran out of gas. (and they have no groceries). To often I've been approached with the excuse of "excuse me sir I live on the other side of town and I'm afraid I ran out of gas could you spare some change so I can get gas to make it home?" Now why would you purposefully go to other side of town for no good reason if you don't have a lot gas in your car?
I'm not rich, far from it, but it's disturbing how lazy some people are that they beg for money just cause they don't wanna work or there druggies, and I feel its an insult to the millions of people out there who are homeless or really jobless, and down on there luck. If I don't have money for gas my happy ass is gonna stay home or walk to where ever I need to go.