Just noticed that if you double click on one of your or someone else's pins that you/they are wearing a box will apear with the pin info.
As you can see it lists the following:
-Type of Pin
-Owner of the Pin
-If it is Tradeable or NonTradeable
-The Magic Word (if its a magic pin)
-And if it were a one time use pin it would say when it expired at the bottom.
Also if you click on a ticket it will show the owner of what room it is good for.