(Also, if there are going to be that many barrels lying around, I feel like the game's NPCs should actually acknowledge that fact through jokes or explaining why there are so many to begin with. That cracked wall and the blighted village entrance ambush are self-explanatory, but that doesn't really explain the prevalence everywhere else.)
I loved the way the excess of exploding barrels was explained in
Concerned. I can't remember the exact one but it's worth reading through for anyone who hasn't done so already.