If an authoritarian regime doesn't like you, it doesn't matter what you say. You can "be careful" all you like, and they will find other spurious reasons to abuse you (such as accent, parentage, skin color, sexual orientation, etc.). It might change who they go after first, but operating within their guidelines is not some guarantee of safety.
No, your best bet is to be loud, proud, and to join with others and tear down the system that enables this kind of abuse. We do not need to accept this as inevitable.