If I see someone walking along a forest service road, I'll stop and check, as long as their appearance and demeanor don't raise questions. Used to hitch hike a lot in high school and college but that was back in the late sixties/early seventies. Times have changed - twenty years or so ago, a good Samaritan stopped to check on two guys next to their car with the hood open, on Idaho Highway 55. Turned out to be a setup - they shot and killed him and stole his car. I've got a responsibility to my wife after being married, so I no longer take such chances. I have, however, stopped and helped people in stalled vehicles along our busy and well-lit interstate in southern Idaho.