Was it 2 eps ago that the teacher said that level 0 is for those they didn't find any power after trying to input them.
She said that level 0 is a generic term covering those who have absolutely no power, those we don't know, and those even more interresting like Touma. That's what I remember.

The fact she said Touma is interresting, also is a link to the thread title.

the power of 0... is equal to nothing in an addition, nullufies anything in a multiplication and becomes infinite in a division...

One also has to remember that 0 is quite recent in human history and there's some fascination with that number.

Is Touma under the radar? we may think he is, but he meets to many powers for it to be true. It's just we don't know yet.
Oh by the way, remember that super satellite that was useful to misaka experiment and got destroyed by Index's awakening?
Why was it presicely there? just above touma's house?
I know its orbit is geostationnary, right above the zone that needs coverage, but right above his house since the beam was perfectly straight?
Also, the detector antenna was pointed downwards too...
Were they monitoring something?
Because you can move a satellite a bit, depending on the zone you exactly want to pinpoint...