Perimeter security before the collapse and riots. (Video)
Barb wire, concertina wire and razor wire to secure your retreat and home.
I got old power poles and went 8′ high with barb wire on top for my most vulnerable area. I Like your T-post extensions, very nice. I was thinking about making extensions like that for the front of the property, attaching the wire and then pulling them off and rolling them up for storage so the fence looks normal in peace and I can raise it quickly if things get dicey.