The problem I would see with this approach is that many times you can find owners, employees of the restaurant, hotel, etc hyping up their own spot and trying to cancel out the negative. So therefore their posts are not biased either IMO. So adding in the gym lovers/haters would make it infinitely worse.
I think if we can distill it to good principles and things to look for and keep the gyms names out of it, then it could be useful for the entire industry. Once we even subtlety advocate a preference (for example NCA style cheerleading over UCA style cheerleading) you then are funneling people to gyms and pointing them away from other gyms. You want them to take the principles and be able to apply them at any gym regardless of location, competition style preference, color of uniform, bows or headbands, etc.