Firefly filter performance

Hi All, 

For my thesis I am analysis NSFW filter performance across Text to Image models and across languages. 

I cannot find a lot of information about the filter from firefly. 

Is the picture blurred/black is the filter flag it as NSWF? 

Is there a chance you could get blocked if you insert prompts that are NSWF? 

Has anyone experience looping through a dataset with prompts in python using the firefly APiI?

Thanks!