I have been thinking about this now for a while, and, in this age of telepathy, want to make 'anti spy rooms.' This would be where you give off a layer of heat to encase the room, where the room is encased in noise to stop people seeing in.
I have this in mind particularly for my guild in the local factory area. If we were to train people in magic, we need to have anti spying things, as, with life I have learned, two fists equals conflict, two guns equals conflict, but with one gun and one fist, there is peace, yes?
So, how do we 'give off' energy to shield the area from spying? Well,t his might be possible with constant application or, just as likely, with a persistent layer of noise given off in advance...
Then, we need to concentrate a lot of 'hatred' around us, as it is dense energy, of course. This will 'fill the room' and then there will be less chance of having the room invaded by the prying eyes of onlookers.
Or, the area might be 'moulded?' this could be done by shaping a 'persistent dome' with your own 'body heat fuels,' where you could craft the dome from the excess heat of yours. This might be possible with the magnetic effects of electron attraction, simply fixing protons to metals and solids surfaces. To get the protons there, we need to make these things denser, and, then they might break, like nitrogen four, of course.
So, we would want to simply draw heat into the room! This would be possible by using 'lighting' to 'bring the electrons down to earth' and then leaving behind something less dense, or, the other way around, with 'lightning striking the dome' with great frequency.