As for protecting himself,
don't forget, Ban Shan Sect is not a vassal of the Dao Imperial Sect. There is inherently no subordinate relationship between the two, so there's no obligation to report back.
The actions of the Infinite Dao Emperor Sect were so swift and decisive that they gave Shen Yi a new understanding of Northern Hong.
"What sort of apology are you talking about..."
The Sect Master of Ban Shan Sect was somewhat at a loss for words and sighed deeply, "If it weren't for Daoist Shen's intervention today, my Ban Shan Sect would have been wiped out a long time ago."
The old man didn't feel that Shen owed his sect anything. After all, a heartless person wouldn't just leave a Jade Slip to clear Ban Shan Sect of suspicion but would straightforwardly throw the dirty water on Ban Shan Sect.
After all, let alone others, even they didn't know the specific identity of Daoist Shen, only knowing that he had come along with Daozi of South Hong.