That is an interesting question. Probably a better one would be "Who to help or who not to help?" You tried to help someone and got stabbed in the back for it. Or you didn't help a person and they got in worse trouble than if you would have given them a hand. So what do you do?
Precept #1 of the Code of Honor is: Never desert a comrade in need, in danger or in trouble.
Now remember, this is a code of luxury and it cannot be enforced on you. I bet you can think of several people, past and present, in your life that truly need some help of any kind. It could be as simple as helping them come up with a solution that could solve their own problems.
Look at how you can put this first code to use in you lives. There is no wrong answer to this, except perhaps not doing anything at all !