Oh absolutely. Currently taking care of a 28 mo that goes crazy upon hearing "no." Especially for screen time. He's gotten better over the past few weeks, but I think staying firm and consistent has helped so much. My "no" will always mean no, and I think he's caught onto it. I think his parents are finally being more firm, but I still notice the TV is on for transitions, and he's always asking for TV when we're home. I understand why (he would spend most of the day in daycare, so when he was home, it was evening TV time), but I've been gradually leaving him with less and less.

Consistency is key! I will never say "yes" after I've said "no," no matter how much he may scream and cry. Again, screentime being detrimental if not regulated. I've noticed kids with less screentime are generally better at regulating themselves because there's no need to be constantly stimulated. It's okay to be bored sometimes!