Bulletin boards are slower than chat channels though. If someone posts something on a bulletin board, it may not be seen for hours or days. Mentors can respond to stuff in Novice Network chat in seconds.

A bulletin board would make it even harder for sprouts to request help queueing for content too. If a sprout asks for help, there's no guarantee that their request would be seen, versus every mentor currently playing and logged into the Novice Network seeing the request instantly.

A bulletin board would be strictly inferior with no real upside. If the Novice Network has mentors abusing their kick privileges, it's up to sprouts and other mentors to report the offenders.