I like having the manufactures answer questions about their products.
I like having the manufacturers let us know when they have new products, and what they are like.
The average (or above average) Joe should be able to post on any product they like.
If the choice is between having the manufacturers here and not having them..we chose to include them.
If HD worked, we would not have had to set up this site. The fact is HD is slow, often crashes, cannot add manufacturers, cannot prune dead forums, cannot add some members like ETR etc..
Since a big component of the HD community is the manufacturers participation, and since we want to capture what makes HD special, it seems silly to leave them out.
Like Jerry said, better that the say it to your face using their own name, then create false monikers like they may do at some other sites.