Already, another Trayvon Martin incident has just happened

[geek_sabre]

279. You watch too much TV/movies

There is no "easily" shooting someone in the leg.

Its far too easy to miss if you try to aim at someone's arm or leg at any distance, especially if they're moving. What if you miss? What if the bullet goes into a neighbor's house and wounds or kills them? There's a reason people are taught to aim for center mass. It is most effective in stopping the attack, with minimal collateral damage. It just happens that it is also more likely to result in death.

If you do manage to hit the intruder in the leg, it may not stop the attack. If someone is high on bath salts or PCP, they probably won't even notice they've been hit until they've lost a substantial amount of blood (and will continue to attack). The intruder may end up mortally wounded anyway (dying from blood loss or shock), or crippled for life. If they live, they'll have standing to sue you.

Shooting someone-- in the arm, leg, toe, chest, or head-- is deadly force. There is no such thing as shooting to wound. Its reckless and dangerous. And it suggests that you didn't feel threatened enough to use deadly force.
If you aren't willing to shoot to stop an attack, regardless of whether the attacker lives or dies, then don't bother with a gun. Leave "warning shots," "leg shots" and shooting guns out of criminals hands to Hollywood.