Fed up with fans interrupting the College World Series games by running onto the field, officials are warning of full prosecution for anyone who pulls such a stunt.

Omaha city prosecutor David Smalheiser (SMALL-hy-zer) said Wednesday he didn't know how many people have been ticketed in recent years. According to media reports, six people were cited last year alone, including a 17-year-old girl who patted the backsides of two players while security personnel chased her.

Smalheiser said trespassers face six months in jail and a $500 fine.

Dennis Poppe (Pope) of the NCAA said "idiots" who run onto the field are spoiling what for most players is a once-in-a-lifetime opportunity to play for a national championship.