I don't know about "recently", but bad reviews are (or at least, have been) posted regularly on RVP. Actually, I love skimming the reviews and reading the 1 star reviews, being glad it wasn't me who was camping!
I've had some reviews sent back or delayed: First was when with my first reviews, I was told (politely) that you have to submit 3 reviews before they will put them on the forum. Then my most recent review was sent back (again, politely): I reviewed a campground that had a bunch of negative reviews. My experience was positive, but we were only visiting friends there and didn't actually look over the campground much. The moderator told me that they prefer reviews from people who actually stay at the campground or at least have a more detailed review - so they did reject a "positive" review.
So, I still very much use RVParkreviews.