Sadly, an half correct but mostly wrong belief. In the stories of Robin Hood, he mostly robbed the sheriff's men of the tax monies which they had collected from the poor by over taxing them. He would take the ill gotten tax money and return it those who had been taxed, only occasionaly, robbing from a noble, and usually not much as nobles didn't carry a trunk of there fortune with them.
Yes I know Robin Hood wasn't real, and I know somone out there is going to call me a geek. I can't help it, I used to love the story when I was a kid.
Now's a fine time to find that out.