Not OP, but why draw a line for WiFi names at all? Do you think an actual terrorist goes around drawing attention like that?
Propaganda is a very important part of terrorism so I would not put that past them. Imagine the headlines if something like that does happen in the future.
In short, a Pascal's wager and a demonstration that it is not easy to have good things.
That's not even necessary. The fact that it could create panic is enough.
And by the way, a terrorist is (by definition) someone who wants to incite terror in others. So any person knowingly broadcasting "we will all die” is a terrorist already.