I've probably raised this point in the past, but it fits here. Before the interent this hobby was not a pack activity, you were a one wolf. You sampled, if you enjoyed you returned. If not, you moved on. I feel that too much good information puts the provider at risk.
On the other hand, I have no problem reviewing the bad ones and the rip-offs. If this makes it more difficult for them fleece others then I've done everyone a service. I would rather read the bad reviews and know who to stay away from. I'm willing to take my chances with the rest.