The Center for Science in the Public Interest (CSPI), supporters of “fat taxes” and big players in the newly stepped-up war on fat, is fighting the availability of some of America’s favorite foods at one of the nation’s favorite museums.

The Smithsonian National Air and Space Museum, a favorite of families visiting Washington, D.C., will open a McDonald’s restaurant this spring to serve visitors. But CSPI’s spoiling the fun, calling McDonald’s “inconsistent with the Smithsonian’s educational mission.”

Citing the Surgeon General’s “Call To Action” on obesity, CSPI instead suggests “fruits and vegetables” be served to vacationing tourists and cranky kids. And where there are activists, there are letter-writing campaigns. CSPI helpfully provides an e-mail letter to send to the Smithsonian, so consumers don’t have to think for themselves.