FDA warns top U.S. bakery not to claim foods contain allergens when they don't

The inevitable regulatory gaming:

>Because it can be difficult and expensive to keep sesame in one part of a baking plant out of another, some companies began adding small amounts of sesame to products that didn't previously contain the ingredient to avoid liability and cost. FDA officials said that violated the spirit, but not the letter, of federal regulations.

Is "may contain traces" / "made in a facility..." no longer adequate labeling in these situations? I know that used to be the norm in America, and it still is in Europe.

My experience with moderately serious non-anaphylactic food allergies is that "traces" are pretty low risk.