My niece started year 7 this year. She's settled well, and is generally a well adjusted, well behaved sensible child. My DC's are younger and not quite at the smartphone / social media stage yet.
DN got her first phone when she started secondary school. Me and SIL we're chatting about DN yesterday, and SIL told her about several WhatsApp groups my DN is now on. Friends chatting and making social arrangements, and the like. I asked SIL if she was checking them / her phone is general, and she was horrified and said no of course not, she doesn't know her password anyway. I said that to would be sensible to check it every now and again, and to let DN that she would be doing so. To me, 11 is so young to have private access to WhatsApp and social media, and it's a parents duty to monitor it to keep the child safe and check for issues like bullying.
I explained that what I was saying was what i understood the general advice to be for parents, not just me being a snoop. I honestly did not say any of this in a judgemental holier than thou way, I was trying to be factual but helpful, iyswim?
But, SIL has not taken it well. She's seen it as both a slight against DN who "can't be trusted", and against her parenting, as I suggested she wasn't doing it right! SIL is a lovely, sensible woman and great mother. I really didn't expect that reaction 