I don't think that pointing out the flaws in a kit is "bashing." It's more like a heads-up to others who may be thinking about buying that same kit, and letting them know about any particular fit or accuracy issues that kit has. So what if the kit is old tooling? I think potential buyers still would like to know if there are any problems with it before they lay down their $$$. Let's be honest... some kits are real dogs. Wouldn't you want to know that if you were thinking about buying it? Or would you prefer to be "surprised" by a box full of inaccurate or badly fitting parts? If you read about the kit's problems here before you buy it, at least you have some information on which to base your decision to buy it or take a pass.
If we're not allowed to comment on a kit's shortcomings, then what are we? Just cheerleaders for the manufacturers? If all we can say is "way to go, Model Company X," and nothing else, we may as well shut this place down.
I say call 'em as you see 'em, positive and negative. That's what a forum is for.