Hey, gro, sorry to hear about this. I followed your posts on here when your DH was ill and quite often think about you, especially as we were pregnant at the same time.

Congrats on the baby, BTW!
I have had similar situations - and I am very shy and avoid any form if conflict - so I tend to just ignore it, blank them out and tell myself that they don't even realise how rude they are being.
But second time around, I'm getting a bit bolder - someone commented on my DSs dummy the other day. I don't like them but see the benefits now as it's the only thing that soothes him sometimes.
So when someone (a friend of a friend I had never met) said: "Those things are disgusting. None of my kids had them" I found myself saying: "Oh, OK. Well, next time he is screaming his head off at 3am, pop round and get him to go off, would you? Ta" but I spent the next hour wondering if she was right. She wasn't - she was bloody rude.
I think what I'm trying to say is, some people are interfering bastards, but in your situation, no-one could blame you if you were rude back, or vocalised your OP.