unless the person had a tm recoil, Bolt recoil shock or the new kwa recoil..........
Or gbbr? none of the above have enough recoil to warrant it, (i've not fired the latter two but I doubt it's a significant difference to the effect a TM would have on your aim, but yeah.
Mine has to be airsofters who hold a gun with their arm outstretched to the side. I mean, what's the point?
I often hold my rifles further up the hanguard than most do, though of course it varies gun to gun as to what I find comfortable.
As to the reason why, it's quite simple really. I own a WE m14, which for a while was my primary or go-to gun, being very front heavy i had to be able to support the weight, and as I'm not the biggest guy in the world, holding just in front of the mag was do-able, but definitely a struggle for extended periods and so I had to use my support hand further up the rifle in order to have a stable stance from which to shoot. That became my standard way of holding a gun so now any carbine or rifle I use, I naturally hold in a similar fashion as that's now what I find most comfortable. I don't wrap my entire hand over the barrel as in the picture of Costa in the OP however with my hand being further forward it's comfier to use an 'angled grip' which you can see below, where i half hold the vertical foregrip and half the gun.
It's all just personal preference and down to what you find the most comfortable way of holding a particular gun- and mp5 or AK for example I hold the mag and handguard in a similar way (albeit obviously much further back).
An angled grip is more stable than the normal style shown below (at least for me) as it means the gun can't or move as much when shouldered.
As for my airsoft pet hate, I'd have to say starting late (although at Iron Sight it's normally my fault anyway :lol: ) or blind firing.