4 ... The email that you receive should contain a link at the bottom of it to unsubscribe from the thread. Alternatively, when browsing a thread, just click the Thread Tools dropdown and select to Unsubscribe from the Thread :)
6 ... ahh, my restriction on the smallest number of characters you can have per post won't let me just enter '6' alone ... I guess that could be a good thing though. It'll keep this thread a lot more interesting :)
You can also find out about how to change the options for how email notification is hanled for your member account, and other useful infoo, in the 'How to do stuff....' topic in the Site News and Feedback section:
Yup ... and we found another person. The word association game actually started at my house one day when me and inscissor were (apparently bored) going back and forth switching usernames and posting. 2100 replies later, it's one of our most popular threads.