If Shi Hao had been an official disciple of the Zhenwu Sect, Zhang Hao would not have dared to do this.
As disciples of the same sect, bullying someone like this would definitely result in severe punishment from the Law Enforcement Hall.
But the key point was, Shi Hao was not a disciple of the Zhenwu Sect, but merely a minor follower, so what was there for Zhang Hao to worry about?
Of course, generally speaking, no one would take such action overstepping their bounds; after all, even if a follower made a mistake, naturally there would be a master to punish him. Zhang Hao's approach really showed no respect for Cao Feiyan.
Why then did he still do it?
One reason was that he considered himself the foremost among the Core Disciples and naturally had to secure order; on the other hand, he harbored ambitions towards Cao Feiyan and Yin Cui'er, and naturally could not tolerate other men beside Cao Feiyan.