In Nepal, my parents always warned me before eating at some rest stops because they said the food was doctored with baking soda to make you feel fuller, guess it was true after all and not just an urban legend heh.
I've sometimes used baking soda to accelerate softening of beans, and I imagine the effect is more appreciable at higher altitudes perhaps? Some of the usage of baking soda could be innocent enough.
No reasonable person would be confused by use of baking soda as an ingredient in cooked food (reasonable) vs the addition of baking soda after cooking as an adulterant.