Hittade detta från en tråd om en liknande situation, den var på engelska dock.
Olika taktiker för att hantera jobbiga barn (barnet i detta fall hette Jake och var 12 år)
When they confront you, simply apologise, saying she wasn’t meant to see it. But imply, with your face, that you stand by everything you said.
Confront the child
He’s 12 now, which means he’s fair game and also capable of dealing with being confronted by an angry, resentful adult. Approach him maturely and calmly, by saying things like, “just so you know, no one likes you…” or “maybe you’d had more friends if you weren’t so annoying…”.
Ruminate
Don’t let yourself forget. Whenever you feel yourself moving on, write down seven reasons this child annoys you. Go and buy one of those little books from Typo. You know, the sparkly ones. If you run out of things to note down, then just imagine hypothetical situations and how the child would react. They’d be annoying, that’s for sure. Read your notes before bed and after exercise, to ensure he’s always front of mind.
Spread the word
Is there anyone who doesn’t know about your hostility towards Jake? Tell them. Ask if they, too, think he sounds annoying.
Be petty
Throughout the year wish every other one of your friend’s kids happy birthday. Buy cakes, make phone calls, put it on Facebook, etc. On Jake’s birthday, be silent. Then message his mum asking if she’s free. When she says that it’s her son’s birthday, simply respond: ‘oh.’
Post a Facebook status
Post a cryptic Facebook status about your best friend’s annoying 12-year-old, with specific examples so people can get across the whole story. When other people comment asking who it’s about, respond with “I’ll DM you.” When your friend enquires just reply, “dw”, followed by, “hope you’re well xxx”.
As an additional tip, if your friend starts to suspect your resentment towards her child, deny it at all costs. Make her feel crazy.
With a distressed mum, who’s deeply confused about her friend’s behaviour, Jake might finally change his tact – rebelling in a way that ultimately hurts others and himself.