I have a fan club? Sweeeeeet.
Dirt, you're the one who keeps calling attention to the threads by posting in them. Nobody was complaining about the "Check Out Dew Scented" or "Who's Going To the Haunted?" threads...the reason there's all these Metallica threads is because they're one of the world's biggest metal bands, this is the most hyped album in years, and every metal board on the net is bringing them up. IF YOU DON'T LIKE IT, DON'T LOOK. It's that simple. TL can ban the topic if he wants, but nothing else is going to stop people from talking about it when there's still something to talk about.
When Testament has a new album coming out, there will definitely be more talk about them, but there's really not much to talk about right now. You can only do "What's Your Favorite Testament Song?" for so long before it gets redundant. If you come up with an interesting Testament topic, people will post on it; if not, then they'll post something else.
And obviously, considering that you went out of your way to say "DON'T TALK ABOUT THESE GUYS!!!" there's still some interest (positive and negative) in them.