Former prosecutor Michelle Campbell, now a Baltimore criminal defense lawyer, agrees that enforcement of ban orders is often difficult. Big-box stores are probably not monitoring for violators across the chain, she said, and a person is likely to be caught for ignoring a ban only if they are nabbed in another crime.
Stadium bans like the one imposed by the Orioles are not unique to Baltimore. In 2009, the New York Mets blacklisted someone who ran onto the field. In 2006, a fan who started a fight at a Detroit Pistons basketball game was banned forever from home games.
In Harvey's case, Campbell believes the Orioles would have a tough time catching him if he returns to the stadium.
"How are you really monitoring that when he's wearing normal clothes?" she said. "How many gates can you walk through?"
Harvey did not face criminal charges — the result of miscommunication, according to prosecutors. He said he's heard about the Orioles' ban through news reports but is not sure that is sufficient notice to keep him out of the stands.
"No one [from the team] has ever called me yet or sent me papers saying I need to keep out," he said. "If no one tells me I'm banned, I guess I'll go back. To go to the game, not to go back out on the field."
The Orioles will not say how many people they have banned or how the organization enforces that policy, according to spokesman Greg Bader.
"If you trespass onto the field, you will be banned from the ballpark and have your season tickets revoked," he said. "And we strongly encourage prosecution to the fullest extent of the law."
His words were fulfilled when Baltimore's prosecutor announced charges against a 19-year-old who went onto the field in the 12th inning of Tuesday's game against the Yankees. Zachary Gregoricus, who faces charges of trespassing, disorderly conduct and disturbing the peace, did not get the mere trespassing warning that Harvey received.
Does Harvey regret his outfield dash and tackle? Absolutely not. It gave viewers a laugh, he said, and gave him a thrill.
"I had the time of my life doing it. I get to check it off my bucket list."
Baltimore Sun reporter Justin Fenton contributed to this article.