I don't get this re: Bonds 756 ball

[Buzz]

somebody should merely record the announcement made over the PA system before the game starts as to, "the [home team name here] invite you to keep any foul ball, home run, ground rule double hit into stands, or any ball accidently thrown into the stands as souvenir of the game..., please do not reach into the field of play and interfere with any ball still in play... yada, yada, yada..."

the announcements never discriminate about who hits what ball. you'd expect a reasonable warning of, "oh, btw, catch a famous guy's dinger instead of a journeyman utility player's, and you'll be identified and taxed up the wazoo..."

I don't get this either...