Yes, I find some of the most amazing food to be created is by street vendors offering double the goods for half of the price just to prove they are worth the stop. I have met and heard such incredible stories as well as learned some of the best culinary secrets from these hidden gems. With that being said, I always carry anti acids in the event my stomach disagrees with my culinary adventure, this is a must in other countries.
Well, where I come from, Virginia, North Carolina, South Carolina, that's where you find some of the best BBQ. Right there, on the side of the road, cooked in a big converted "whatever" tank of some kind, with a big fat man standing there, working the meat and smiling. Now, That's Take Home! not that stuff you get at a drive through of a chain restaurant.
I used to live in Austin and did stop at some roadside BBQ setups. Some of the guys by the side of the road really know how to make good BBQ. I guess I would be even more likely to stop if there were a lot of people there already.
There aren't anywhere around where I live, but no. Besides the creepy-meat factor (and even if I ate much meat at all), I'd have an issue with a "fly-by-night" looking set-up, and concerns about food handling, hand-washing, flies, etc. As it is, I overcome, or ignore, a lot of reservations I have about a lot of food places.
I won't even buy donuts at the local gas-station Dunkin Donuts in warm weather because there are flies that come in the drive-thru window and get all over the uncovered donuts. (Years ago I e.mailed DD and suggested they cover the donuts. They sent me a coupon for another dozen "fly donuts".)