Is it safe to leave a horse in pasture with it's bridle on?

Many people do because their horses are hard to catch, but the best thing to do is train a horse to easily and willingly be caught so you don't have to leave halters on, just to eliminate possible incidents, like while trying to scratch their head with their hoof, mostly with shod horses- the horseshoe catches on the halter easily and can make the horse fall if it gets stuck, and he can seriously injure himself. Or when scratching their head on a tree or fence post, there is a possibility that it could get hung up on a branch or somthing, frightening and possibly injuring the horse. It is made less dangerous with break-away halters, but it's best to not leave a halter on.