I just noticed this - if you are looking at postings - you can see the person's name on the left hand side and if there is a green dot next to their name then that person is online perusing LL at this moment. Never noticed that before - comes in handy if you want to send a message to a particular member
I hated it when I could be tracked on or off line and what I was looking at on the LL community. For those who are like me, LL has a setting that turns the tracking off. You can find it under the "general settings" of your account.
I love to see the green LED by my name when I am posting in the community. Gives me a sense of security, knowing someone is watching me. It's the same reason I use my GPS navigation system in my SUV, I like for those who are watching over us to know where I am.