I wrestled in HS. Didn't know and didn't care what a foul was on my mission. Pump fake and jump horizontal into me and call me for a foul--don't recommend you do it twice. They learned not to set a pick on me unless they were sure they could actually stay on their feet... my job was to guard that shooter, not pussy foot around someone who thought that I should take the long way around.
My assignment was always the other team's best shooter. He'd get so frustrated he couldn't shoot straight--along with half the team. Eventually I learned a couple of the rules, and even followed them most of the time.