Is there something we don't know that only the inside people know here?

So there are some aspects that aren’t available for us,as users on fluther but I’m curious if this aspects are available for inside people(people outside users),I know they can read modded post but I’m curious about others.

So let me ask a few question,and I hope a mod or whoever know can tell me: (These refer to inside people)
-Could they know who just come to fluther and how long each user spent their time here?
-Could they know who flag who?
-Could they know who lurve who?
-Could they read our PM,how about our deleted PM?
-Could they know the people who hanging in a thread? (When no one write a post,it just shows the number of active member)
—-Will they leak one of these information if someone ask them about it?—

That’s all,I hope I don’t put too much trouble for mods here,and thank you for your time.