That language is intended to resonate with people who look at cat pictures on the internet and who are (obviously) the people whose clicks made the video in question go viral.
The TSA isn't Reddit, we're talking about people's real security at stake here. Them joking about "things that go BOOM" is just downright distasteful, especially when people are expecting them to confront the security concerns more seriously. Them joking about this makes them look like a joke.
