Comment by scaryclam

I mean, unless you work at an organisation that deals with a specific religion, I would say that they're all NSFW, as there's no reason to be using them at work, and they're bound to cause controvosy at some point.

Given the level of NSFW material in some of them (sex, violence, etc), I think it's not surprising they're getting labelled as such, even without the link to a religion.