Should we be scared of that "Product of China" label on food?

Recently I've noticed that some of the food I've brought home has been stamped "Product of China." First it was (supposed) organic frozen spinach; then, garlic; finally, bay scallops. I probably wouldn't have brought any of it home had I noticed the label in the store because I worry about food grown in China. Why?

• Much of the press before and during the Bejing Olympics discussed how polluted that city and other Chinese cities are.
  
  
• Chinese food and food supplement regulations and inspections are more lax than those of our own government, and more subject to corruption, as the recent scandals on contaminents in human food, pet food and infant formulas have shown.
  
  
• I hate the idea of my food coming all the way from China. It's one thing to buy oolong tea since it's in small quantities, and is dried and easy to ship, but frozen spinach? How much energy did it require to freeze it, ship and truck it frozen from China to Maryland?
  

Looking around today on the Internet to see if my worries could be verified, I easily came upon the article, Grown in China, by Ralph Nader. Although I've often found Nader alarmist and a little hysterical in recent years (I wish he would stop running for president), the article contains some information that is worth noting. He says that the United States imports 80 percent of its seafood and China is its major seafood supplier—and  fish grown in China is often farm-raised, grown in contaminated ponds and fed antibiotics because of the putrid conditions. 

The FDA has issued assurances on its Seafood Safety Program,  in which they have testified that the "FDA currently screens electronically-submitted information on all incoming shipments, and then uses a risk-based approach to target our inspectional resources at products having the greatest potential for causing harm to public health." But Nader says that the FDA is able to inspect only about 1 percent of food shipments into the United States, which is hardly reassuring.

But the worst thing that Nader conveys is the information that: "except for the required labeling of seafood from foreign countries (consumers take note), all other food in your supermarket is not required to have a label of the country that exported it."

So, while I can avoid seafood from China and start buying fruit grown in the U.S. (easy to see since almost every banana, apple, etc., is labeled with place of origin), there's no way of knowing where the chicken in my frozen potstickers was raised. That leaves me with three choices: learn to make potstickers from scratch (very unlikely since I once spent a whole evening—prior to having children—making cabbage-stuffed pierogies), forego them all together or just get used to eating food products from China. 

I'm not happy with any of these choices, yet since potstickers are not a major part of my diet (they're only an occasional/emergency snack-meal for us), I'm not all that worried about eating them. What's more worrisome are the foods that compose most of our meals, the supplements we take, the green tea I drink everyday. What's in them? Where did they come from?