Yes, absolutely. Just recently in Cape Breton, Chief Annie Daisley of the We'koqma'q First Nation was very successful with posting billboards. There's a very beautiful, powerful billboard on the sign of each indigenous community in Cape Breton. There may be some on the mainland in Nova Scotia as well.
My vision for that is to have a QR code or something right on the bottom of that sign to allow people to access the red dress alert system.