Bluetooth prone to hack?

I found this article about bluetooth hacking and it made me worry

When Bluetooth is enabled on your device, it’s essentially broadcasting the fact that “I’m here, and I’m able to connect” to any other Bluetooth-based devices within range. This makes using Bluetooth simple and straightforward for the consumer, but also lets hackers know which ones to target very easily. Here’s how it’s done; a hacker can simply download some special software and install it on a laptop or netbook. He can then install a Bluetooth antenna to that computer and put everything in a backpack, briefcase, etc. Now, all he has to do is walk around public places where a lot of people are concentrated, and let the computer running in his bag do all the work while no one has any idea what’s happening.

The software on the computer will constantly scan the nearby surroundings of the hacker for active Bluetooth connections, and when it finds them, can do a variety of things without the owner having any idea what’s going on. The entire process is automated for the hacker as well, so all he has to do is walk around for as long as he can and collect as much data as possible, which he can then manipulate. Some attacks are less damaging from others, but Bluetooth allows the hacker to do many things.

Once the hacker’s software finds and connects to a vulnerable Bluetooth-enabled cell phone, it can do things like download address book information, photos, calendars, SIM card details, make long-distance phone calls using the hacked device, bug phone calls and much more. There’s a myriad of software freely available that’s made specifically to attack cell phones via Bluetooth connections, and every time an update to the technology or certain cell phones becomes available there’s bound to be new hacking software for it. Certain attacks have become so prevalent that they even have names these days