In chapter 10, how does Jack handle those who disobey his wishes?
In chapter 10, Jack has set up his camp on Castle Rock where he rules his tribe as "a proper chief," as Roger states. Roger has approached the camp and is told to "halt" by Robert, who guards the entrance. A large boulder has been set up as a defense for the camp, and leaning fully on the lever will send it "thundering down to the neck of land." Roger admires this set-up. Robert then reports that Jack is "going to beat Wilfred" for an unspecified crime. Jack became angry and told some of the boys to tie Wilfred up. Wilfred has been tied up for hours, awaiting the beating. Roger is impressed with this display of "irresponsible authority" from Jack.
Roger then finds the rest of the tribe where Jack is sitting, face painted red and white, among his tribe. Wilfred, "newly beaten and untied," sits in the background sniffing. He has evidently been beaten severely enough to make him cry, and he now is temporarily outside the circle of the other boys. Certainly the other boys have taken note of Wilfred's fate and fear having the same treatment. Jack evidently tortures, beats, and ostracizes those who run afoul of his desires or temper.
Later Roger helps enforce Jack's wishes through violence and becomes even more violent than Jack. This scene is key to understanding how violence becomes the way Jack's tribe enforces its brand of order. In chapter 12, Samneric tell Ralph: "[Roger's] a terror. And the chief--they're both--terrors."
Jack handles those who disobey him by force and by simply beating them. Jack is symbolic of the brutal dictator who rules his subjects with force and the threat of force. Jack holds "councils" naked to the waist with his face "painted." Jack also handles difficult situations by ignoring them, or by easily dismissing them. His handling of Simon's death, for example. Overall, Jack is a leader of force, emotion, and irrational actions. His methods of control reflect all this.