Really a backhanded explanation, isn't it? It's like she's explaining it, but she's also threatening to beat you with that same explanation.
Now, I wouldn't say I don't see where she's coming from on this. In fact, I can see where almost all these people are coming from who come out of the woodworks when they see some new FPS or whatever. They think "oh, that's super-violent, we don't want kids exposed to this!" And I can support that. These are not games for kids. Even the ESRB and other gamers will blatantly point out that Bulletstorm and games like it aren't for kids. So why is this an issue? Because some parents are stupid enough to actually buy games like this for them.
An example, you ask? Very well. I was in a Gamestop inside of a month ago, and while I was perusing their selection of new games (because I refuse to buy used from there) I overheard some kid talking with his parents. Apparently the kid had gotten his parents to buy him two World War II-themed FPS games (Call Of Duty 2 and Medal of Honor Airborne, if you must know) and said kid was talking about which games he already had so that his parents didn't get the same game twice. To this, all I could do was think, "wow, it is amazing how these parents are exposing their child to violence. I mean I know the older Call of Duty and Medal of Honor games are pretty tame by FPS standards, but even so, it's still about shootin' dudes." To be fair, maybe they'll monitor their child's gaming habits and prove me wrong, maybe not, but I'm getting off the topic.
The point is Bulletstorm is targeting a certain audience (console First-Person Shooter fans of a 17-24 age range) and some people are concerned about it falling into the hands of a younger demographic. And that's fine, young kids can be and are impressionable and could be taking away the wrong message from games like this. But you know who to blame when little Tommy gets his hands on this? Not the gaming community, not the ESRB (who never seems to catch any flak despite their ratings are, for the most part, ignored by the consumer base), not the store who sold the game (who are explicitly trained to not sell M-rated games to people under 17), not the developers or the publishers. The blame lies squarely on mommy and daddy for buying the game for their child.