However, you NEED to be careful. I would not do it alone, and we should have even taken more precautions than we did (for example, we should have let someone back home know where we were headed and when we would be there... instead we just went wherever the wind took us that day lol).
We had this big Canadian flag that we held up while hitching and people always picked us up really quick : )
for longer trips i would try and take percautions. i would always text the liscence plate number to my mom or to a friend. i would usually go with a friend, and never at night. and sometimes i would wear a fake pregnancy belly as a rape deturrant, lol.
i haven't hitchhiked in over a year because my boy has a car and hates for me to do it. but i had so much fun. you meet so many nice people. mostly when they pick you up it's because they want someone to talk to. of course there is the occasional creepy person, but i've never had a bad experience.