There are some site settings that control the auto-silencing behavior based on flags:
-
num_users_to_silence_new_user- this is the number of unique flags it takes to silence a new tl0 user, set to 0 to disable -
silence_new_user_sensitivity- this is how likely a new user is to be silenced based on spam flags, you can disable this -
notify_mods_when_user_silenced- this will message moderators when a user is silenced, so it can make it easier to catch and unsilence someone if needed