How about hanging our flags upside down...which means distress?
A kind of SOS. We're in a heap of trouble, we all know it. If there was ANY time an SOS is needed, the time is now.
We need this to be big, widespread. I do know it is the SOS signal, but remember the controversy about the use of the word “niggardly” a few years ago. Needs to be simple and straightforward so even the uninformed followers of the left will understand. My guess is, they would characterize an upside-down flag as disrespectful, which is the polar opposite.