i have no problem whatsoever with Crossbows being licened, infact i'd quite like to see them banned - this is because i see, on a fairly regular basis, what happens when some idiot with a crossbow tries to poach some Deer.
overwhelmingly they miss - fine, but where does the bolt go?
the evidence here - in Wyre Forest, Mortimer Forest, and Forest of Dean - suggests that very few poachers using a crossbow achieve a clean, or fairly clean, kill. we (forestry commission, deer management group, local landowners and farmers, and the wider community who use these forests) find several deer every month who have been injured with crossbow bolts but not killed - or in a case this year, where a deer that had a leg broken with a very visible crossbow bolt collapsed infront of a forestry worker and when it was examined and euthanised by a vet, the animal was so emaciated that the vet thought it had been hobbling about for perhaps 20 days after being shot.
we also have poachers trying to poach Deer with shotguns and dogs - and even vehicles.
broadly, the people who think they can toddle off to the woods of an evening and fill up the freezer haven't the wit that God gave a Sheep, no skill at shooting and less concern for the welfare of their quarry than a rapist...