This is an excellent view of charity! If you give with your heart, you won't be thinking of the negatives and abusers, you will be thinking only of the people who you are able to help. Unfortunately there will always be people who take advantage of situations, but there are genuinely a lot of people out there that need help and as you say here, if only 1 out of those people actually use the money for food, you have made a difference :)