It has been very much prevalent there for a long time but it then converts the line of control into a virtual nightmare when both sides have to occupy posts sometimes as near / close to 50 meters from each other. Movement, logistics and routine becoming a hell for both sides.
The civilians populate and till their land right upto zero lines. Snipers would create a No Man's land of miles astride the LoC. Pakistani soldiers and infiltrating terrorists disguise and dress as civilians. Now, how does one distinguish between a soldier and a civilian ?? That is why Indian Army have to kill the terrorists only when they cross the LoC.
When one is required to hold nearly 750 Km of LoC frontage one side can not be dominating the other all over. Posts on LoC is required to hold nearest ground even if non tactical rather than dominating ground only.
Under such peculiar conditions sniper wars can be very devastating to both the sides, particularly for civilian population.
Moreover, India is in favour of a cold LoC rather than hot LoC so that it could check infiltration more effectively trough anti infiltration grid which is quite in open without consideration for domination or protection from directional fire.
Escalations on LoC is another reasons for Pak to make excuses to the Amirkhans that they need more of their guns, F-16s and greenbacks.
So No snipers there.
Snipping even during wars would be difficult due to Indian Army policy of not harming the civilians deliberately.
Indian Army considers civilians on the other side of LoC as their own but Pakistani Army does not. Snipping leads to Civilian losses.