Hanging Signs can be Double Sided

I think the new hanging signs could have a new use given their expense as a crafting recipe. I think they should be editable, as rehanging a sign takes a lot of effort, but more seriously, maybe have it so depending on what side you click (with an item maybe). So that each side can have a different meaning. 

Example: Say you have a little shopping district, one side is for the Groccery store, the other is for the Barber shop, builders may like this