Wonder no more: that's how we got them here. The internet is a scary place for a number of these manufacturers and having a bit of control is the only way they would agree to join. These deletions are anything but "often". They are the exception and many are due to inflammatory language or the poster having a clear agenda to embarrass the business. If you feel that your hosts are out of line, PM them. Be nice and help them understand a better way of handling complaints. They won't know if you don't tell them. Many of the manufacturers here, like Oceanic and Zeagle, do that very thing already. Hopefully, you are showering them with accolades and buying their gear, so that the other manufacturers get the picture.
ScubaBoard presents a unique opportunity by providing a conduit from the end user straight to the factory. Quite often, you are bypassing customer service and talking with senior level staff, including presidents and owners. A lot of these manufacturer's forums are under-utilized and I encourage everyone to reverse that. Make it a point to engage them and help them understand just how important we are. Ask questions, make suggestions and don't forget to give them kudos when they deserve it. If you need to criticize, please do it respectfully and work with them to reach a solution. This is a learning experience for a number of these businesses and you have the chance of making a difference in how they will interact with the community.