What? Do you know how sticky rice is made? I lived in Khon Kaen for 8 years, os obviously I do. It's made quite a bit differently than steamed rice, but more importantly, is stored totally different. Sticky rice is stored in a dry container with no added heat, usually one of those baskets with a lid, or a rount ice box / cooler thing. Whereas steamed rice is generally stored in a warm and humid rice cooker.
Do you have a rice cooker at home? Have you ever made rice for dinner, then accidentally forgot about it, and left rice in the cooker overnight? Not exactly appetizing in the morning, is it? And sometimes restaurants do just that, but instead of throwing the rice out in the morning, they go ahead and sell it.
This is well know, and although obviously doesn't happen at every place, it definitely happens. There's been a good number of news reports of people getting sick due to that.
Up to you, but I always preferred to cook my own rice at home, even if we were grabbing lunch / dinner from the market. Besides, most people use either those blue or green bags of rice, which was fine I guess, but I always preferred the red stuff. Tad more expensive, but was larger and fluffier grains.