Yes bulls are some of the most dangerous critters on earth. My neighbor was killed by the bull, my brother-in-law was tossed into the air by a bull, landed on top of a freestall pipe, lots of bruises and a cracked rib. These were family farmers where the bull was raised by the family, ear scratching and all. The problem is they are totally unpredictable, can turn from nice to killer without warning. Just the way it is. If kids wander near by or into their area how tragic could that be. Not worth the chance when for a few bucks you can hire AI. Even if it was cheaper to raise one, it's not worth it.
J