Thread Subscription is on by default. While I try to read everything when I sign up or subscribe to something, I do overlook things. I would imagine this is the same with many other people. I have to admit I was fairly surprised when I got about 10 e-mails within an hour. Someone else has also raised this question. After some searching, I was capable of turning it off (Hope it works). But I suspect this will raise many topics in the future with the title, "H0wZ u tuRn 0ff 3mAl3 5u8SkriPsHuns, d00d!!!!!???????"