I run an online community. Building a safe space is extremely difficult and full of grey area, online or offline.

There's a fine line between the freedom to express yourself and offending someone else. As a community moderator, choosing what is and isn't offensive is by definition subjective. It's an impossible task for a global, multi-cultural community. You end up with a vanilla message board where most interesting thought/debate is stifled. Reminds me of the campus "safe space" debate.