Hi
This may seem like quite a weird question. I came across this video on YouTube where this Dutch guy was apparently hacking stuff such as a train station large display, or a bridge, or sending mass SMSs using "cellbroadcasting". At first it seemed very difficult to believe but after a while I noticed that it may very well be possible since he works with some IT company and ther is a legit interview with him. The comments section is mixed however, and I am attaching a link to the video so you can see for yourself.
Cheers,
Adam