As long as Iran is not deliberately hit by foreign drones, striking their forces (and causing deaths) probably wouldn't constitute an adequate response. What can and should perhaps be done, however, is to fly some Iranian drone(s) over their positions, in particular over the locations of armed elements imported from Syria. That would send several messages at once.
I woulnd't use those maps published on the internet to draw any definitive conclusions, as they are based on open sources and more likely than not, they are far from showing Iran's complete air defence arsenal. I'm not saying the maps are uninteresting, but chances are they don't offer an exhaustive full picture.
Specially when it comes to ultra-mobile, "all in one" units with no fixed ground positions such as the Talash / 3rd of Khordad series, meant to be used as asymmetric "ambush" AD weapons, these will not be parked somewhere in the open at all times. So Iran definitely has more of these in stock than the ones identified thanks to readily accessible satellite images by open intelligence analysists in weblogs or on Twitter .