Absolutely true Fred. Usually it is just those small places which are sometimes unhygienic and who may keep food for days and do not have any protection against the sun and I wouldn't eat in those kind of places. The only place we will eat Padang food in Bandung delivers new food everyday, unfortunately sometimes late.. We also sometimes buy rendang from them by the kilo when we hold events as we will be doing today. The owners are from Padang and friends of the inlaws.
Ubudian's concerns very much apply with street food. We will only buy from a very limited number of street sellers who have been either recommended by my wife's parents or who we know to have good hygienic food. That includes the guy up the street deep frying tofu and the sate and fried rice sellers who operate in our area. Then there is a famous street sate place behind the famous Gedung Sate in downtown Bandung which is super hygienic and super tasty. My wife also will not take chances with risky street food sellers and I hope other people will also be prudent as it isn't funny to get food poisoning or dysentery.