Why am I suddenly watching dozens of sites and pages?

To give this new feature proper launch all our users have been automatically subscribed to sites and pages based on the following rules:

• if you are a member of a site, you watch it (including all the page and forum changes)
• if you are an admin (or creator) of a site, you watch it (including all the page and forum changes)
• if you have edited or commented a page on a site you are not member of, you watch it.