My feeling is that metal theft is getting out of control. If the news reporting on it is to be trusted, cases are in fact rising. Thieves have probably always hit junkyards and stolen wire, but now there seems to be more and more infrastructure hit as well.
The oddest aspect of this is that scrap steel isn't even worth that much. How many tons could that be? Let's say it's 400 tons, that's maybe $100k. And it seems like extremely high risk, because they're going to be looking for this everywhere now. Why would they not just steal two or three cars, which would never make the news. They must be skilled to pull something like that off in a night.
Edit: Another user linked the street view, apparently the article image wasn't the actual tower. So based on that it's much less metal even.