Depends on the thread, some (say, made of natural fiber) have enough fibers so the surface tension of the fibers will keep the thread floating. Others, like polyester will sink because the surface tension of the water cannot not support the thread. This is how certain flying insects seem to be able to "walk" on water. I hope that helps.
When Dave or Jaimie [SINK] a thread, people can still post on it, but it doesn't rise to the top, it keeps sinking down. that way people forget about it and new people don't join in. When a thread is CLOSED, no one can post again on it, but you can still read it.
A (really skanky) strip club, guns & ammo shop, or a bait & tackle shop.
Not that I would patronize the first two, but it would be kinda cool to brag that my town has these, therefore raising my status amongst some of my acquaintances.
So I was at Eden Gourmet this afternoon and I a saw a guy with a Last Star fighter t-shirt and I almost said "cool t-shirt" but I thought my wife would be embarrassed so I kept quiet.
norman