[LearnsFromMistakes]

Maybe they should just post a sign at the stadium and request fans not run onto the field...seriously, how difficult is that?

[Kid Shelleen]

Maybe he was protesting MLB’s decision to have the All-Star game in Phoenix..

[Artemis Webb]

"Maybe they should just post a sign at the stadium and request fans not run onto the field...seriously, how difficult is that?"

It is common knowledge to all baseball fans that you don't run onto the field or you are subject to arrest. One should not have to post a sign for every possible offense, especially when the offense is common knowledge.