In slow-pitch softball, that’s true. In major-league baseball, no; you can hit foul balls forever, theoretically, as long as one is not caught before hitting the ground.
Once a foul ball hits the ground, it is dead, and it doesn’t matter if a fan touches it. It’s still forbidden for a fan to reach into the playing area to touch it, but they won’t usually toss you out for doing so. To be on the safe side, fans should not reach over the railing into the playing area.
Players MAY reach over into the fan area to catch a ball, but real fans would grab an opposing player’s glove to prevent him from catching a ball, while vacating the area for a home player to make a play. Most fans probably don’t know this, because I’ve never actually seen it done. I’ve never had such a seat.
Edit: Kudos to the guy for taking it like a man. He realized what he’d done, and what the punishment was. He knew he’d have to leave. And it didn’t change the game, I believe. Double either way.
