Yeah, once fully grown, it's basically impossible to go through them. I saw a giant probably 20ft diameter clump of a male plant in CR, and yep, nothing would ever try to touch it.
The problem is they don't like cold, and I assume you get occasional freezes.
Not many people have fruited them in FL.
They will deter any animal I would think
but to grow them into a hedge like you see in the tropics would probably not be feasible in central FL.
I would rather lean into finger lime or natal plum etc...