In "The Grapes Of Wrath", Joad was not worried about his parole duty because?

From the text:

Tom held his hand over his eyes to protect himself from the lowering sun. "Don't you worry," he said. "I figgered her out. They's lots a fellas out on parole an' they's more goin' in all the time. If I get caught for anything else out west, well, then they got my pitcher an' my prints in Washington. They'll sen' me back. But if I don't do no crimes, they won't give a damn."