A bill introduced in the U.S. House last month would ban the flavoring of any “tobacco product.” The targets are vaping devices (vapes, e-cigarettes), but also cigars and pipe tobacco. (Flavored conventional cigarettes, other than menthol, have already been banned.) The Food and Drug Administration deems vaping devices “tobacco products” even though they contain no tobacco. Introduced without sponsors by Rep. Rosa DeLauro (D-CT), the bill would allow an exception for some vaping products, but it is one that would be all but impossible to qualify for. The rationalization for the...