I've visited Lady Musgrave Island in the Great Barrier Reef. It is covered with trees called "the grand devil's-claws", the seeds of which are barbed and sticky. The seeds stick to the wings of birds eating seeds, and so they can spread across islands.
However, a visitor to the island will soon notice lots of dead birds on the ground. There are no predators or scavengers, so the birds lay there decomposing.
Thus, the trees use the birds not only for reproduction, but also for food. It's a carnivorous forest out there on the reef.
[0] lists 28 documented cases - if we ignore the 5 before 1943 (probably not reliable records), that gives 23 in just over 80 years or roughly one every 3.5 years (although you'd expect that to have increased over time as more people live or tourist near the trees)
Of those 23, 5 were infants (<3y), 1 was killed by 4 coconuts, 1 was killed by a bunch of 57 coconuts(!), and 2 were accidentally killed by their harvesting monkeys.
I was in south India for about a month and I heard of 1 person dying from a coconut during that time period and heard it wasn’t unheard of. Not a lot of people die but plenty of folks get injured.
As the article points out: If conditions exist for "high-quality plant growth" (correct light, soil, moisture, etc) then plants don't make weird adaptations like eating things/water-conservation methods.
However, if those conditions DON'T exist, then it's hard for plants to get very big.
There's also this: the larger a moving creature you're trying to capture, the more resources you need to invest in the trap. Bladderwort exists everywhere because it's easy to trap small/microscopic things. Giant bear-eating plants exist nowhere because consistently trapping a bear with just leaves, sap, and stems is really fucking hard.
At a certain point, the plants reach an equilibrium where the effort is worth the end result, but diminishing returns if they got larger.
One can imagine some pretty twisted stuff, but anyway large mammals tend to have enough brains to learn to recognize dangers without, or failing that, with evolution (think innate fear of snakes).
If you want to speculate about that, then how about the bamboo die-off cycle? Imagine if you lived in the PNW or Appalachia, and every 120 years the entire side of a mountain launched an army of hungry rats at you. Starves all those cute smug “panda” gluttons too.
Brambles can trap sheep, benefiting from the sheep as fertilizer: https://www.youtube.com/watch?v=mrGobnZq83g
Falling coconuts can not only kill people, but probably kill far more small animals, again benefiting from them as fertilizer,