Stupidity: Lucas was standing between some SCABs and the girl bullying the boy, but was looking in another direction. The other SCABs obviously saw the bullying but didn't respond. Lucas turned his head and saw the bullying and immediately intervened. The other SCABs didn't move and continued to simply stand there and watch. (01:17:16)
Stupidity: The Good Boys were going to ride their bikes four miles to the mall but did not even think to bring bike locks with them. Also, even if there were no locks on the bikes when parked in front of the store, this does not necessarily mean that the bikes would not still be there later for the Good Boys to pick up. Thor just assumed that the bikes were lost/stolen forever because he said his family would not be able to have "Cycle Sundays."