They are using such technology. I've seen it mentioned in many different sources as being a tactic the Israelis are using. But the shooters employ shoot and scoot tactics so it's not always possible to get them. By the time the Israelis vector in coordinates to fire, they may well be gone. But they've taken out a good number of mortar and rocket batteries using this technology. It's just not a perfect solution, especially if the animals happen to locate their weapon right in the middle of a bunch of civilians.
Actually, given the primitive nature of the katusha, how could they be certain that it is actually following a true ballistic trajectory that would be traceable back to a point of origin with enough precision to avoid collateral damage?