Fences are erected by beings (human) - my experiance in life thus far is any hurdle humans erect can by by sufficient ingenuity be undone. That applies to computer network defences and hackers.
Those are Indian fences. The electric supply can be switched off. Then ingress can be made and you will be surprised how much this can be useful -
Besides ever wondered how can India accuse Pakistan of cross border terrorism when apparently there is a fence there? If a fence was entirely waterproof nobody ever manage to cross these things.
The fact is along the LOC there is always low level firing, shallow intrusions or even mortar fire. If you have spoken to family members who have people living near the LOC you will find their lives are blighted by firing and sometimes civilians even get killed. You hear news reports about this. This is not restricted to one side, both sides at squad level take things in to their own hand. When things flare up local commanders step in to control the situation from escalating. This is life on the LOC. When tensions arise like recently then there is more chance of this happening.
However to characterise these regular events as "surgical strike" or "full scale invasion" is rubbish. To get that recognition would require large scale attack - maybe over company level strength by special forces and even then without significant artillery support they would not be able to penetrate the LOC. This would be even less so given both sides were in state of high alert. The other possibility is air-drops but both sides are about equally matched in tech., and such a mission would be compromised very fast.
All this is about politics. Not military. PM Modi won on platform of Mr Tough Guy. Now under his watch the Uri incident happened and all his supporters expect something hard, something fast. Knowing that he had to feed something despite his military telling him that things could very easily go crazy. So he came up with rather clever move. Give the public what they want. Surgical strike. Whose going to check? Pakistan is going to deny it but Indian media will carry the story for few days and public will have been placated. Win win without a bullet being fired. Modi supporters don't need forensic evidence. They already have the making of Bollywodd movie "Surgical Strike" with who knows "Surgical Strike II" coming out after.
On another note I 1,300 miles away on other side of Indian/Bangla border there is the - Cow strike?