Granted, it was just for a day, but hopefully makes an impression on the team members:
Amid reports of cyberbullying and other off-the-field problems plaguing his team, Labrum suspended his entire football team—80 players in total—after a loss last Friday to Judge Memorial Catholic High School.
According to Amy Donaldson of the Deseret News, Labrum and his entire coaching staff sat the team down and instructed them to turn in their equipment, including uniforms. He then made it clear the team would not be allowed back on the field until they proved themselves—not as players, but as human beings:
“We felt like everything was going in a direction that we didn’t want our young men going,” said Labrum, an alumnus of the program he’s coached for the past two years. “We felt like we needed to make a stand.” [...]
“We looked at it as a chance to say, ‘Hey, we need to focus on some other things that are more important than winning a football game,” Labrum said. “We got an emotional response from the boys. I think it really meant something to them, which was nice to see that it does mean something. There was none of them that fought us on it.”
Read more: http://bleacherreport.com/articles/1786370-high-school-football-coach-suspends-entire-team-due-to-various-issues?utm_source=cnn.com&utm_medium=referral&utm_campaign=cnn-sports-bin&hpt=hp_bn15 
When the team was reformed, they voted in new captains and performed community service.
Do you think this was an effective tactic?