In the early years of the Space program, smoking everywhere was considered normal. But NASA was ahead of its time. After members of the "Original Seven" were seen smoking on TV, NASA was concerned about the squeeky clean image the astronauts and urged the astronauts to quit smoking.

Wally Schirra Quit before his Apollo 7 flight.

So in the sources I can find, the smoking was "only" a public image issue. All the astronauts seem to have had enough common sense not to smoke where it would be dangerous (ignoring the fact that smoking in itself is dangerous for the smokers and the people around them).

In the early years of the Space program, smoking everywhere was considered normal. But NASA was ahead of its time. After members of the "Original Seven" were seen smoking on TV, NASA was concerned about the squeaky-clean image the astronauts and urged the astronauts to quit smoking.

Wally Schirra quit before his Apollo 7 flight.

So in the sources I can find, the smoking was "only" a public image issue. All the astronauts seem to have had enough common sense not to smoke where it would be dangerous (ignoring the fact that smoking in itself is dangerous for the smokers and the people around them).