There's always provocation when there's a border with people on each side armed to the teeth and distrusting each other. It's just a question of whether the people involved want to use it as a reason for escalating the conflict.

Look at this year's Israeli assault from the Lebanese side, and the skirmish that was used to justify the war was one that had been started by Israel. And the rocket bombardment that was presented as the cause and justification of the Israeli attack actually followed the start of air strikes by Israel.

Looked at from the Israeli side, there had been some previous rockets, and there was always the potential for more (as was demonstrated in the events that followed the Israeli attack). And the Israeli incursion into Lebanese soil that set off the initial skirmish was only a couple of feet.