Would you intervene?
On the patio yesterday I saw this woman smoking a cigarette with her friends. Three other friends of mine (all guys) agreed the woman was probably about 7 months pregnant. And smoking.
We were all aghast, but paralyzed with the appropriate action. Go question her? Shut the hell up? Silently judge?
If it matters, she was likely some flavor of European. I bet that baby gets a bit of red wine to go with his nicotine.