Instead of tossing out your hats in the garbage or hauling them off to donate, consider repurposing them around the house ... and place a potted plant inside. The interior of the hat will act ...
In reality, I could give a s--t about "taking your hat off indoors." In fact, I have a hat on in my own house right now ... Is "hats off inside" an anitquated rule? Something only crochety ...