The vast majority of us are playing this as a game, not as a profession. The equivalent is closer to little league, or high school teams.
I played varsity tennis in high school, and I'll tell you this: There were occasional players that found ways to cheat. They were hard to catch. Most non-professional tennis games won't have an officiating judge, so we called our own games, and some people didn't follow the honor code and fudged calls. It was nearly impossible to do anything about, but the one thing we DIDN'T do was let it ruin the game for us.
Meanwhile, any kids that felt the need to scream racial slurs or curse their opponents out were pretty quickly penalized and removed.
It's not that different from league. Both types of misbehavior aren't tolerated, and one is much easier to catch and punish than the other.