Corvids are a pest on much more than arable land
Contamination of livestock feed and enclosures
Protection of lambing sheep etc etc
They can also be controlled for the protection of gamebirds,,,your land doesnt have to be a shoot,, you can be protecting partridge for example.
You can almost always find a reason to control pest species, your permission owner wouldn`t ask you to shoot them otherwise.
Getting caught shooting pests in your own small garden could be an issue,, but again,, public health issues should cover you,,,,,,they are shitting in my ferrets water for example!
A