That's what happened to Lance Cpl. David Motari, a veteran of combat in Iraq and Afghanistan, assigned to the 1st Battalion, 3rd Marine Regiment at Kaneohe Bay. You might remember him. One of his friends, a fellow Marine, took a video of him throwing a live, black and white puppy over a cliff.
The 17-second video showing Motari throwing the puppy spread widely on the Internet beginning March 3 and led to international headlines and death threats against his family in Monroe. An investigation began shortly after. As of Jun 12, 2008, the process of discharging him began.
Here is a link to a youtube video to refresh your memory.
Thankfully, the Marines don't accept this kind of behavior.
"The actions seen in the Internet video are contrary to the high standards we expect of every Marine and will not be tolerated," Marine Corps Base Hawaii said in a news release. "The vast majority of Marines conduct their duties with honor and compassion that makes American people proud."
The second Marine, Sgt. Crismarvin Banez Encarnacion also received unspecified "non-judicial" punishment.
Now, if they would have charges filed against him and order mandatory psychological counseling. They took a dangerous person, discharged him, and let him go about his merry way. Their problem is now society's problem.