So here they are...
Regarding bad breath encounters:
When I was in labor with my 4th child, the labor coach leaned down to say something to me, and unwittingly assaulted my nose with an engulfing wave of severe halitosis.
My sense of smell isn't well-developed and smells in general don't usually bother me. But as everyone knows, smells are often more acute & accompanied by dramatically unpleasant reactions during pregnancy.
And labor is a pretty intense & sensitive time in & of itself.
Anyway, upon my nostrils being engulfed by her unwitting halitosis, I promptly started retching & looking for a place to vomit, wondering all the time how on earth I was going to make it through the entire labor & delivery when her bad breath affected me so badly.
And I couldn't bring myself to tell her.
Ultimately I don't remember exactly how it all worked out (maybe she realized and took care of it on her own or maybe she just didn't end up getting that close to my face again), but it did work out and I don't remember it happening again.
The point is that halitosis right near a pregnant lady's nose could have worse consequences than just the standard olfactory unpleasantness.
Maybe it helps to know that when the people stopped making their bothersome noise, the bothersome noise from the other neighbors also stopped. Not always right away (although sometimes, yes, right away), but it did stop not so long after—or at least, significantly lessened.
And that's it!
B'ezrat Hashem, may we all merit to behave according to middat hachassidut at all times.