When I was at school and bullying had serious implications for the victim in one case, the kids involved were genuinely mortified and took punishment on the chin and really did not anticipate what they were doing until it was almost too late, thankfully it wasn't and those bullies did change, I know that's just one example but today you have the bullies laughing and taunting when their victims can't take any more, they have no remorse and no care for the results.
And I think that as a pp said, it's reflective of society. We don't seem to, as a society, try and bring teens down to earth at some point and gently let them know that they're not the centre of the universe. I noticed this in the generation that's now got teen children themselves, they don't seem to have grown out of the 'me me me' phase. And they're now adults, bringing up children of their own with the same mindset.
Children were treated very differently, even 20 years ago, and changes happened and rightly so because awful things went on, but I think the pendulum has swung too far the other way and it's showing through now in bullying, anti social behaviour and crime. We have a generation of now grown children that think they are the only important person, and that's being passed on to the next generation now.
For instance, I was no angel, as a group of teens we drank 'up the pit' on a Friday night, we were well away from houses, not because we were considerate, but because we were scared of getting caught, because we respected adults and especially the police! They did 'raid' a few times and a few of us were carted home in the back of the van. It was terrifying! My parents grounded me for my natural born (still technically grounded now I think!) And school dragged us all out in assembly and we got an almighty bollocking for disgracing the school and ourselves and had lunchtime detentions, as well as one after school a week until the end of term. No, it was not pleasant to be humiliated in front of everyone, but we, as a group, deserved it. It was a warning, because the police basically delivered us home, and expected parents and the school to deal with it - they did.
Now I see kids drinking openly, in the street, and the police can do nothing if they're under 18, except confiscate, and then they/the parents just buy more. Even if not drinking they openly taunt the police, knowing there's very little that they can do even if a law is broken, because there'll be little in the way of punishment. Certainly not enough to change behaviour.
There needs to be a middle ground found. Between the old school slipper and cane and today's free for all, so that punishment is severe enough that you respect others and the police/justice system, and don't do it in the first place, but not so far that children are abused or back to having no rights and not being listened to at all.