Explanation of items/buttons on User Profile Frame

When visiting someones farm, a number of possible buttons and icons appear on their User Profile Frame.

I have circled and marked these for easier reference:

1. Exclamation Mark Icon

I assume that this is to indicate that there is something on the farm you can help him with? I might be wrong though, so what does this Icon represent?

2. Emblem/Badge Icon

What does this one represent?

3. Star with number

This is the players level?

4. Ribbon Icon/Button

This is to 'Follow' or 'Bookmark' someones farm?

5. Message/Mail Icon/Button

What is this one for?

6. Smiley Icon/Button

This is to 'Like' someones farm?