Rabbi, is playing paintball permitted according to halacha, since you’re intentionally shooting at others and potentially causing pain, bruises, or minor injuries, even though everyone agrees to participate? Does consent make a difference, and how is this different from boxing or other contact sports?

Also, what about playing paintball or basketball with your father? Given the prohibition against striking or injuring a parent, is there a difference between intentionally hitting him during paintball and accidentally injuring him during basketball? Does his consent change anything, or is there a stricter prohibition when it comes to parents?

What are the main halachic sources and principles that determine whether these activities are permitted?