The gym was loud, so even if you are standing 10 feet away, you can't hear what is being said. My son did not share what was said until after Scouts, when we were walking back to the car.
If we see the behaviors or hear things we stop it immediately, but we can't be everywhere at once. Sometimes it subtle, and because I went through it when I was younger, I am hypersensitive to it. I have talked to different scouts about this, but they say they did not ignore, block or turn their back, eventhough it is what I saw. So at times I feel I need to have a secret camera out to catch them in the act.
Unfortunately, being physically bullied is much easier to identify as it is very black and white. You were either hit or threatened or you were not.