NEW YORK ( MainStreet) — Misbehavior in professional sports is inevitable: emotions run high and wealth abounds, so participants are willing to suffer the financial consequences of their misdeeds in order to communicate a point or get an advantage.

Unsportsmanlike conduct, however, can range from the juvenile to the down right nasty. MainStreet has collected a list of the 13 most horrendous sports fines.

Mike Tomlin

Earlier in 2013, the NFL fined Pittsburgh Steelers coach Mike Tomlin for interfering with play for the sideline during the week 13 loss to the Baltimore Ravens. As kick returner Jacoby Jones broke free down the sideline, Tomlin with his back to the field, stuck his foot out as if to trip Jones. Though Tomlin was not fined immediately, the league took subsequent action. "Any time a player or a coach from the sideline is in this white area, that's a 15-yard penalty for unsportsmanlike conduct," said NFL vice president of officiating Dean Blandino said." "If they interfere with the play, it could be what's called a 'palpably unfair act.'"

Jason Kidd

In November, Brooklyn Nets coach Jason Kidd was fined $50,000 for intentionally spilling a drink on the court to try to delay the came. With the clock winding down against the Los Angeles Lakers and no remaining time outs, Kidd did what any self-respecting second-grade would; he had Tyshawn Taylor bumped him to result in spilling a soda on the court.

The need for a speedy clean-up allowed Kidd to map out a game plan for his team to try to make up a two point deficit with 8.3 seconds remaining in the fourth. Yet his wilely ways weren't as inconspicuous as he would have liked. A replay clear shows Kidd asking Taylor to "hit me." A puerile action, perhaps appropriate for someone with that last name. The spill drill was to no avail anyway. Paul Pierce missed an open three attempt with 2.2 seconds left, and the Nets had to foul intentionally.

J.R. Smith
You can't fault J.R. Smith for immaturity. The NBA issued a warning against the New York Knick for reaching down to untie Shawn Marion's left shoe during a foul-shot line up against the Dallas Mavericks. That didn't deter him from striking again.

Smith proudly said on Twitter that he does this every game. But it would prove a costly bit of mischief. Earlier this month in a game against the Detroit Pistons, Smith reached down to swipe the laces of Greg Monroe, who successfully moved his foot in time to avoid the prank. He was slapped with a $50,000 fine.

Though the most expensive on the docket, that's the least of his problems, somehow. He had been fined $25,000 for "directing hostile and inappropriate language" toward Piston guard Brandon Jennings on Twitter, suspended from the first five games of the season for violating anti-drug policy and fined $25,000 for posting an inappropriate picture of a woman on Twitter.