Easily one of the most dangerous bit of farm equipment. I’ve seen several people killed by getting their hand/arm in a PTO shaft.
When we got a mower we went with a flail mower because we'd be mowing near neighbors and a bush hog(giant lawnmower blade style mower) will happily pick up a rock and send it with enough force to easily kill someone at a good distance. Flails tend to throw less things(which is why highway maintenance use them for mowing along the road).
Fortunately overrunning clutch attachments are cheap to add.