Someone proposed that Technomancers should be able to use 
double their Arete in resisting magick (and having half their Arete 
when casting magick). This reminded me of one of my ideas, the 
Sceptics.

A Sceptic is a person who is firmly rooted in consensus reality. This 
is not just a superficial intellectual connection, but a deep 
subconscious link to Reality. In a way they can be called deep-
sleepers, sleepers who are more asleep than others. That makes 
them dangerous for the Traditions is that they are so intensely 
anti-magickal. While normal sleepers just hinder magick somewhat, 
these Sceptics actively counteract it. If a mage tries to cast some 
magick in the vicinity of a Sceptic, the sceptic will work as a 
wandering Paradox domain. 

For example, a Sceptic with three "scepticism dots" will roll three 
dices against any magick in the vicinity, and each '1' will counteract 
one success for the mage, and may even make him botch. Magick 
becomes much harder around them, and neither the mage or 
Sceptic will know why. Since Sceptics will almost never experience 
magick or other supernatural phenomena, they will be much more 
convinced that such things do not exist.

The Technocracy knows about Sceptics, and are actively searching 
for them. The Technocracy have created organisations with Sceptics 
in them to actively disprove magick, parapsychology, fraudulent 
science and other "non-tech" things. A typical example is CSICOP, 
the Committee for the Scientific Investigation of Claims of the 
Paranormal, a well renowned organisation with many respected 
scientists in its ranks, which studies and tries to debunk 
parapsychology and pseudoscience. The Sceptics in it effectively 
damp out any possible effects from the investigated phenomena. 
Since the claims cannot be proven, the organisation dismisses the 
phenomena as fraud, sloppy experimentation or other normal 
explanations. The technomancers also use it to find Orphans or 
other magickal activity.

Another use for Sceptics is of course "bodyguards" to important 
people and places, to protect them from magickal attacks. 
Important technomancer allies may have one or two Sceptics 
nearby, often without their (and the Sceptics) knowledge.