Wow, in that other thread someone mentioned throwing the flare to mark a sniper.
if this is Milsim, and you throw a flare at someone in real life, their clothing is likely to catch fire.
Overall I do support the idea of those cheap flares being an option but I don't think there is a tonne of usefulness to them.. Marking Ammo zones ect can be easily done with small flags or even short pylons before the game, and be much more resistant to damage.
On the note of flamethrowers however... I just personally don't believe they have any real use in airsoft, are they even used during combat anymore in real life?..