I want to know the answer to the following question:
What did the mysteries seem to threaten that made the Romans occasionally attempt to ban them?
All the background I'm provided with is that "Sporadic and sometimes brutal attempts were made to suppress religionists who seemed to threaten traditional morality and unity, as with the senate's efforts to restrict the Bacchanals in 186 BC.". Is that enough to answer the question?
Answer: yes