Welcome to 2015.
This video was posted to the Diamondbacks Facebook Page with the caption...
"Did you really go to a baseball game if you don't post a #selfie?"
So you can take the announcers point of view and criticize the girls for not paying any attention to the game or appreciate the fact that they are at a game in late September for a team that has a losing record.
Either way it looks like everyone is enjoying themselves.
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Looks like they aren't the only ones taking selfies.