The Militia claims in their release that they will target coalition aircraft with them in oder to punish the coalition for dropping aid to ISIS, a claim circulated by many militia commanders and their media outlets.
This new development can be now other that an extremely dangerous situation where rouge Militias can now target any aircraft regardless civilian or military for political or social leverage.
The World community has expressed many times with the Syrian case that they are unwilling to supply Anti Assad forces with similar rockets yet Iran has just done so to its own militias & with unknown quantities.