I did totally misunderstand the hooked blades suggested then 42. Most looked like billhooks or the like, where the inside was the sharpened edge, and that was what I was referring to here as probably "less than ideal". But wouldn't a hook sharpened on the outside, just end up being a long trailing edge? Or are you talking still sharpened on the inside edge, but just cutting away from you?
The problem with "dragging" canes wasn't usually too big of a deal, except when I was quite literally "wading" into these tall thickets (where I couldn't reach the canes at the top of the arc, even though I'm ~6'1", and was holding a 30in OAL machete). I mean, I did my best to not literally be encircled/tunneling into the center, but even when I was working around the edges the best I could, it was in this scenario when dragging a cane was the worst/most likely to occur.
Most of the times when I dragged a cane, the one that hit me wasn't the one that I was trying to cut. Instead it was one I couldn't quite reach yet, and was either completely intact and long, or, was previously cut, but suspended/stuck above me by other canes.
The reason it typically wasn't the one I was cutting, was that usually I was cutting off 1 - 1.5 ft of cane at a time. If it drags then, its shorter than the length of the machete, so no big deal. But in the really tall areas, I couldn't always cut 1-1.5 ft off at a time, because it was out of reach overhead, so I'd have to go to where I could cut it next, and sometimes that left 4-8ft of cane coming down at once, which led to more tangles/snags, and why it was worst in those situations.
Fortunately, its really not a major problem. Its not like heavy tree limbs were coming down on my head. The canes do have some good sized thorns, but I wore a hat, and had a hoodie on (this was Feb/Mar in the PNW when I was doing this), so there weren't any real injuries, just scratches.
That said, I could have leaned the edges back on the machete more. And if I had a dedicated blackberry machete, and lots more blackberry to cut, I would go with a longer and lighter one, and sharpen it very acutely.