Until I was pregnant, I never encountered this, thank goodness.
However, the moment I announced my pregnancy all of a sudden every single mouthful of food I ate was being scrutinised, not by people close to me but by random friends-of-friends on Facebook.
Worst moments? I posted a photo of some freaking awesome escargot that we had at this great little french restaurant here in my home town, and this was when I was about six months pregnant. I'd already eaten my half of the dozen, and Husband was working on his half. When we got home there was a message on the house phone from one of Husband's aunts, who had seen the photo on her son's FB feed and had decided to call my MIL to get our home number and had left a three-minute message berating me for 'putting my child in danger' by eating 'that filth' while pregnant.
I ignored the message, and when Husband mentioned it to MIL when we saw her next she was mortified, apologised for giving out our number (not a big deal, she could have found us in the White Pages) and said that she'd speak to her sister-in-law about it.
A couple of weeks later at Christmas we had a fantastic buffet of cold meat and salads (Australian Christmas. Hot food is not what you want when it's 40-plus degrees celsius in the shade) and this same aunt spent the entire afternoon glaring at me and muttering under her breath about 'irresponsible young people' and how my child is going to be deformed because I dared to, at six months pregnant, to eat what I liked, only avoiding soft cheeses because there'd been a listeria scare in our state earlier that month.
I mean, sure, I expected some raised eyebrows when I went for the prawns, but honestly, I trust my MIL and FIL to prepare them properly, and I knew that if I wanted to they would not have cared if I'd passed them up - but prawns!
What I was not expecting was this aunt to leap to her feet and SHOUT at me "PUT THAT DOWN!" I actually dropped my plate in shock (it hit the table and didn't break but I got salad dressing all over my dress) and she then started to yell at me about eating unsafe things while pregnant.
MIL asked her to leave, thankfully, and Husband took me aside because I was pretty shaken up by being screamed at by a relative I'd only met twice before this (at the two previous family Christmas gatherings) about my food choices.
MIL informed me yesterday that this aunt asked her over the weekend why she wasn't invited to my baby shower...