Let me share a story I've heard from an IDF soldier , this evening on my way home.
About 500 meters from the border there are remains of a house that was destroyed during the last war. Of that house, only the concrete pillars left standing, therefore the house is called the "pillar house" among the soldiers. It is known, that in a bunker, hidden in the basement of that house, there is still, a large quantity of weapons and fighting gear.
Leaving aside the question, why didn't IDF remove these weapons during the war, I would like to convey you to you, a scene that the IDF soldiers witness from their watch post.
On the Lebanese side of the fence, from time to time you can see a group of people (Hezbollah without any doubt) arriving in their off-road vehicles and Mercedes taking out of the remains of the buatilding crates and boxes and loading them at their cars, while the UN soldiers peacefully observe, from a few meters distance, sometimes leaving their personal weapons in their patrol vehicle.
Quoting the soldier, "the UN forces are a joke", is something that was to be expected.