Thanks everyone. My decision is two-fold.
I know this is overkill however I bought this and I am waiting to see what it looks like.
Amazon.com | Pacsafe Wrapsafe Anti-Theft Adjustable Cable Lock, Steel | Luggage Locks
I have something like this when I was going to Colts games, and the hook will fit where the clip hole is and can't be removed without ripping it in pieces.
Amazon.com: NFL New England Patriots Velcro Breakaway (1) 2-Tone Lanyard +(1) Ticket Holder Breakaway Key Chain: Office Products
So, I decided I will basically use my placard at the mailbox, and in town squares where there is no parking. It would be a lot to walk 3-4 blocks to get a donut. however I am worried about the Publix where there is more of an 'outsider' situation. I trust villagers (I mean they leave everything in the rec centers on an honor system) but the people outside TV I do not trust.
What think?