Why is good, good? For instance when kids bully another to the point of suicide, is that a matter of perception that the act is bad and some may perceive that as good? — Sherbert
So now we have a point of view, a perspective from which to perceive "good". Good in the moral sense is different from good in the tasty sense or bad for the environment sense.
In your example there are also several points of view, the bullies, the bullied and the other people that perceive the acts.
The bullies might think what they are doing is well deserved by the person they are bullying and think that it is OK to do it.
The person being bullied would probably think it was bad.
But a third party viewing individual acts or even several acts might not even think about it being bad. It might be perceived as normal quarrels between people or even as just plain stupidity being acted out.
It is only when specific details of a case are revealed that a proper judgement can be made.