I love Cowboy lump. It burns clean quickly and leaves very little ash. The downside is the burn time but you should be getting longer that 4 hrs. When I use Cowboy I fill her way up to top of fire ring.
I voted yes also. You won't keep trolls out by making them register.
I frequent 1 other forum and they have an "ignore" feature where you can determine if you want to see a certain individuals postings.