If it were agreed that this might be useful, I would like to see some protections agreed. In somewhat the same way that we have established rules about advertising, we should be careful about any criticism unjustifiably dissuading others from purchasing a particular brand or from a specific supplier.
In particular, establishing the individual circumstances around a suggested equipment failure might be important. A walking pole that bends when its saved its owner from falling to the ground after they tripped on the way down from the Alto del Perdon would not, to my mind, constitute failure. Similarly, I would be less sympathetic to a complaint about a pack being badly designed because of the back pain that it caused where I to know it had been carrying more than the harness had been designed to handle comfortably, or that it had been packed so that it was unbalanced laterally, and was permanently leaning and loading up one of the user's shoulders over the other.
Further, I don't think we should attempt to use this in place of consumer protection arrangements that exist in our respective countries. If there are genuine complaints that need to be addressed, such organisations are generally in a better position to represent these matters to traders and manufacturers than a forum like this might be.
Finally, I would rather know about what gear worked for people. While it still might not be possible to know exactly how it was used, at least one knows that if it has survived even a short Camino route, it has been robust enough for that.
Regards,