Such practice is all a bit disingenuous I feel.
Its a public forum that cannot be pursued for litigation, so if somebody has a beef with a company, lets hear it. Chinese Whispers are worse than an opinion based on experience as there is no individual judgement call.
As I understood it, RPI engineering took on the Buick/Rover V8 from J-LR and were naive in doing so. I've never had any dealings with them, so I cannot comment either way. But I'm always interested.