I agree about WhatsApp groups. I'm a parent and a teacher and definitely see the value in a WhatsApp group when used as intended: "Does anyone have the spelling list for Thursday?", "What time do rehearsals finish on Monday?" etc, but cringe so hard when parents use it to vent about teaching staff or ask "Is it just me, or has anyone else found Mrs X to be [insert any number of horrible traits]...?" and sit back and wait for comments and anecdotes to roll in about Mrs X's alleged shortcomings.
It's awful to know that colleagues (including myself) are discussed in this way, having our professional conduct dissected and disparaged by a group of adults who were never in the room, could use proper channels of communication but instead choose to noodle on WhatsApp at 11am on a weekday morning. It gives me some comfort imagining that the 95% of the silent members who aren't part of the pile-on are probably rolling their eyes as much as me.
I see some absolutely wild behaviour in my primary school. We make a real and concerted effort to view all behaviour as communication and to work with families straight away to support children to make good choices. The parent who, off the bat, says "No way, [child's name], you're definitely not doing that anymore." is vanishingly rare. Much more common is a presumption of fault on school's part.
My old pupils regularly pop in from their secondary school to collect younger siblings or to say "hi" at the end of the day. The love 'telling' on their old primary classmates "Miss, you'll never guess what Ciara did in DT today!", "Toby got a detention in Maths for fake coughing all the way through the lesson." etc. My own DC tell stories about their classmates' antics -I generally believe and sympathise with the teachers.
There's one caveat for me though, both as a teacher and as a SEND parent; the journey through school as a pupil with SEND can be grim when there is no appropriate provision in place, and it's not uncommon for this to be at the root of disruption and dysregulation. My starting point with any challenging behaviour is always to look for any unmet need and to address these.