From news article:

Lebanon filed a complaint with the U.N. against Israel for erecting a barbed wire near the U.N.-drawn Blue Line in the town of Adaisseh, the foreign ministry announced on Friday.

The ministry said in a statement that the incident took place on Feb. 8 when Israeli forces “erected a 40-meter concertina wire near the Blue Line in the town of Adaisseh to block the road leading to the Blue Line and that crosses into a minefield.”

The complaint, which was submitted to the world body through the Lebanese mission in New York, described the Israeli move as “an infringement on Lebanese territories as well as a violation of Lebanese sovereignty, Security Council Resolution 1701, international law and the Charter of the U.N.”

It also said that the erection of the barbed wire “threatens international peace and security.”

Lebanon asked U.N. Secretary General Ban Ki-moon to take the necessary measures to end the Israeli violation, the statement added.

They're angry their snipers won't have a clear shot.