Some Idea’s and alternatives:-
We Indians have also border with Nepal, Bhutan, Mynamar which is not guarded. Any body from Nepal and Bhutan can enter India or from this side without visa. But the Indo-Pak border is not same. We are fought 4 wars. In Short, Settle Kashmir dispute first and then build Chinese Wall type wall of borders. As long as you will occupy Kashmir, your lesser fencing won’t make you safe.