Never had serious problems back when I did most of my thumbing. Other than getting picked up by some drunk who was driving so bad I was ready to jump out if he slowed down enough. There were stories of guys hitchhiking and getting robbed at gun or knife point by those that picked them up. I learned that I should fold up most of my cash and stick it in my sock by my ankle and only carry a few bucks in my wallet so that's what I did on those long hitchhikes. Luckily I never got robbed.
