If you see a thread that you are interested in but don't necessarily want to contribute to you can choose 'Watch Thread' over on the right and also choose to receive email notifications when new replies are added.
You can always choose 'Unwatch Thread' if you no-longer wish to watch it.
Threads that you are watching show a little icon of glasses over to the right.
You can always choose 'Unwatch Thread' if you no-longer wish to watch it.
Threads that you are watching show a little icon of glasses over to the right.