My buddy has an app that can control any projector close to him. He has currently frozen the projector and our professor is freaking out 😂— Curtis Tekell (@MCT_704) April 10, 2014
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I break all the rules.
I called up a friend in my school's IT office. This can't be real, can it?
Oh shit. This is not a drill.
It turns out that, yes, you can control electronics with phone apps. However, there are some ways to avoid the problem. Projectors and such require a passcode. They also might work only on certain wireless networks that your school controls. If your IT office changes the code from its default, it's unlikely a student will crack it. A private wireless network can be available only to the IT people who set up the classroom computer and projector. If your school takes reasonable precautions, this won't be a problem for you.
Of course, if schools are prudent like this, higher education would be in better shape than it is.