My constructive comment would be to use the faction feedback thread. Thats what it is there for.
Feedback threads applicable to me get reviewed when people post in them. Especially when that poster is constructive in their criticism (and tells the truth - which is not always entirely the case). Rarely does anyone post good stuff there so yes, sometimes it can get heated but it's feedback.
So with regard to your original question, are there any consequences to this kind of behavour?
Yes if the faction is made aware of it and wasn't before, it is presented in the right manner and is fairly truthful. It doesn't have to go on the forum in all it's glory. Often a general question followed by a pm gets things moving far more constructively than a flamefest in public. There are a lot of large ego's here.