The Trump store needs to sell *something* — like a nice deterrent kind of thing — to add to the signs.
Yeah, but then they’d need to ship it to you through an FFL. :=)
https://www.amazon.com/Tanglefoot-Tangle-Trap-Sticky-Coating-Aerosol/dp/B000NCYQMS
Place sign out and spray this all over it. When they grab the sign to pull it out it gets on their hands. Naturally they wipe it on their clothes ruining them, and when they get back in their car, upholstery gets ruined.
Tape some job applications to the sign. No liberal will go near it.