If the main point is slowing/frustrating drone production?
It would honestly be kind of fair game to sabotage production of drones that would be used against you, even if they're made in a country you're not at war with --- if it wasn't for Russia having a lot of responsibility for that war in the first place (to put it mildly).
what do you mean "fair game"? by the same logic russia attacking ukraine is also "fair game".
"hei cmon im just atacking my neighbor its fair game, what else should i do"