The thing that worries me isn't the drone/anti-drone escalation. It is the fact that these weapons aren't actually limited to anti-drone use. Recently we have seen clear examples of countries, including Israel, that will use automatic id technology to mass tag a population. If you then have tools that can automatically track and mass kill, which this type of weapon represents, then we have reached a type of warfare that is new in the world and deeply scary. It isn't hard to imagine a scenario where person x is killed since they are marked as a 'bag guy' and as part of being marked every person they were next to for the last few days was also marked as likely enough to be bad guys to kill as well. All that has to be done is push a button. It is a scary, and unfortunately all to possible, future if not now.

It seems incredibly hard to imagine what else you would do with a ground based laser other than shoot at incoming projectiles. What exactly are you expecting the Israelis to do? Change the laws of physics?