And then there's that microwave or sonic weapon that (Cubans? Cubans with Russian help? Russians with Cuban help?) have been causing all sorts of injuries to Canadian diplomats and staff working in Havana (eyesight issues, brain issues, etc).... that's another fun one....
... and what about the mobile crowd control microwave systems for containing and directing crowds.... what's the effect of getting too close or getting too long of a dose? Not so good.....
The blinding tech advancement lately seems to be smaller hand held units with very strong emissions. And putting those on drones then using them to screw with people on the ground and aircraft on approaches or takeoffs when something going wrong would be the worst....
Another interesting bit from Niven was the laser with the dialable dispersion - on tight, it's a beam laser 'wand' or a fast slashing 'laser sword' with more than a 2m reach (anyone nearby) .... and if you dial it to full width, you get a rather useful flashlight. They did hit locations and damage per location so when you used it as a sword, you got to split the total output between several targets and then evenly by a number of hit locations.... quite a handy tool/close in weapon/mid-range weapon. Probably out towards tech 13 or 14 in Traveller terms.