The site is manually moderated. I made the mistake of posting it over my lunch break and had to go back to work which caused a significant delay. I'm back on processing things now.
Very few have been "inappropriate". There was one with some questionable jokes that I held back and another where someone was quite angrily talking about a particular political party (there are other "political" statements I've allowed; I just don't want to the page to become some place for people to yell at each other -- not going for that vibe).