First of all, all of these little hamlets are on empty land, neither owned, occupied nor cultivated by anyone and that includes Arabs. Extensive maps of owned land were researched and made over thirty years ago during the "golden era" of ישוב הארץ Yishuv Ha'Aretz, Jewish return to live in the Land of Israel.
Yes, some of the small Jewish villages are on mountain tops, but others, like Givat Asaf, are on the main road. All of the pictures I take of Givat Asaf are taken when traveling by it on a bus. Givat Asaf is at a very crucial and dangerous junction. As you can see, it's not protected in any real way.
Givat Asaf was established after Arab terrorists murdered Asaf Hershkowitz of Ofra. Asaf, HaYa"D, was murdered at the T-junction to Beit El, a short time and distance from where his father had been murdered. In response, a community was established at the spot, overlooking the road.
The existence of a Jewish village at that junction increases security for travelers and trempistim waiting for buses and rides. But for the young determined and idealistic families who live there, there is a vulnerability, not only from terrorist enemies, but also from the Leftists and courts who have targeted them from day one. Despite the dangers and opposition, the community has been growing, thank G-d.