Below is some rather valuable information from Israel's Ministry of Foreign Affairs website.
Keep in mind that when Ehud Barak pulled every last Israeli soldier out of Lebanon on May 24, 2000, he gave the following very clear warning:
From now on, the government of Lebanon is accountable for what takes place within its territory, and the Lebanese and Syrian governments are responsible for preventing acts of terror or aggression against Israel, which is from today deployed within its borders.
Keep in mind as well that throughout this period, an U.N. "peacekeeping" force of approximately 2000 members (UNIFIL) was stationed in southern Lebanon to confirm compliance with UNSC 425. So how'd they do?
The following is a chronological list of events along Israel's northern border in which Israeli civilians or soldiers were killed or wounded from May 2000 until July 12, 2006.
27 May 2006 - An IDF soldier was wounded when Katyushas were fired at an army base at Mt. Meron in the upper Galilee.
27 Dec 2005 - A branch of a Palestinian organization connected to Al-Qaida fired 6 Katyushas, damaging a house in Kiryat Shmona and a house in Metulla. In response, the IAF attacked a training base of the Popular Front, south of Beirut.
21 Nov 2005 - An attempt to kidnap an IDF soldier was foiled when paratroopers patrolling near Rajar village discerned a Hizbullah unit approaching. Private David Markovitz opened fire, killing all four. In a heavy attack of mortars and Katyusha rockets that ensued, nine soldiers and and two civilians were injured.
29 June 2005 - More than 20 mortars were fired from across the border. Cpl. Uzi Peretz of the Golani Brigade was killed and four soldiers wounded, including the unit's doctor. Fire was exchanged and helicopters and planes attacked five Hizbullah outposts in the Reches Ramim area.
7 Apr 2005 - Two Israeli Arabs from the village of Rajar on the Israel-Lebanon border were kidnapped by Hizbullah operatives and held in captivity for four days in an attempt to obtain information on Israel.
9 Jan 2005 - An explosive device was detonated against an IDF patrol at Nahal Sion. One Israeli soldier was killed, and a UN officer was killed.
20 July 2004 - Hizbullah sniper fired at an IDF post in the western sector of the Israeli-Lebanese border. Two IDF soldiers were killed.
7 May 2004 - Fire in the Mt. Dov sector. IDF soldier Dennis Leminov was killed, and two other soldiers were severely wounded. The IDF returned fire.
19 Jan 2004 - An anti-tank missile was fired at IDF D9 while neutralizing explosive charges near Zariâ€™t. An IDF soldier, Yan Rotzenski, was killed and another soldier was severely wounded.
6 Oct 2003 - Staff Sgt. David Solomonov was killed when Hizbullah fired at an IDF force south of the Fatma Gate in the eastern sector. In addition, the Hizbullah fired missiles and rockets at an IDF post in the Reches Ramim area.
10 Aug 2003 - Haviv Dadon, 16, of Shlomi, was struck in the chest and killed by shrapnel from an anti-aircraft shell fired by Hizbullah terrorists in Lebanon. Four others were wounded.
20 Jul 2003 - Hizbullah snipers fired on an Israeli outpost near Shtula, killing two Israeli soldiers.
7 May 2003 - Hizbullah attacked IDF positions in the Sheba farms with heavy rocket, mortar, and small arms fire. One Israeli soldier was killed and five others were wounded in the attack.
29 Aug 2002 - Fire at an IDF post in the Mt. Dov sector. IDF soldier Ofer Misali was killed, and two other soldiers were lightly wounded.
12 Mar 2002 - Infiltration: In a shooting attack on the Shlomi- Metzuba route. Six Israelis civilians were killed, among them IDF officer Lt. German Rojkov.
14 Apr 2001 - Fire at an IDF post in the Mt. Dov sector. IDF soldier Elad Litvak was killed.
16 Feb 2001- Fire at an IDF convoy on Mt. Dov. IDF soldier Elad Shneor was killed, and three other soldiers were wounded.
26 Nov 2000 - A charge was detonated near an IDF convoy. IDF soldier Khalil Taher was killed and two other soldiers were wounded.
7 Oct 2000 - Kidnapping: Three IDF soldiers: Adi Avitan, Omer Soued and Binyamin Avraham were kidnapped by the Hizballah from the Mt. Dov sector.
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In addition, Hizbullah was involved in terrorist acts carried out by affiliated Palestinian terrorist cells in Israel:
28 Apr 2001 - A 60 year-old Israeli man was found stabbed to death in Kfar Ba'aneh, near Carmiel in Galilee. The terrorists responsible for the attack were apprehended in July. Six members of a Hizbullah-linked Palestinian terrorist cell responsible for the murder were arrested in July. The murder was the initiation rite of the organization.
1 Apr 2001 - A 42 year-old Israeli woman was stabbed to death in Haifa. Her murder was the initiation rite of a terrorist cell, whose members were apprehended in July. Six members of a Hizbullah-linked Palestinian terrorist cell responsible for the murder, originally thought to be criminally motivated, were arrested in July. The murder was the initiation rite of one of the terrorists into the organization.
Finally, note that the official UNIFIL "fact sheet," updated as of July 24, 2006, observes that "the Security Council has deemed that UNIFILâ€™s presence has been helpful in promoting stability," and describes these unprovoked incursions and the measured Israeli responses to them as "frequent ceasefire violations and occasional serious incidents from both sides of the Blue Line."