I was pointed to this topic by a moderator on this website. I'd like to agree that this rule actually is absurd, and should not be put in to effect.
The "Other Bands" section is a place to talk about other bands. You should be able to talk about the bands you enjoy freely, without expecting a lock on the topic simply because people disagree about these bands. There is no band that an entire world can unanimously agree is the "best band ever". Obviously, we will always have someone who isn't a huge fan... which is why there's always room for debate.
A lot of times these "arguments" that people are talking about, are really meant as debates between why a band is amazing, and why a band isn't so amazing. At the end of the day, the only thing you can really accomplish is to feel like maybe the opposing view opened their eyes just a bit and took in what you said. That is what I would love to accomplish when discussing my reasoning for disliking an album, or for loving an album.
This is why I'm not a huge fan of locking threads in this section so fast. If arguments get too out of hand, warn people and tell them that the argument is too out of hand... don't just lock a topic and ruin an entire thread because a couple of people can't keep themselves from going insane.
I should be playin' in the winter snow,
but I'ma be under the mistletoe