Bertil-
I think you are right about the effect of psi shielding on a NAS. A telepath
with a shield active should be undetectable by a NAS. (Or a standard NAS at
least- the referee may have access to some amazing TL(Big Number) equipment
that his pesky players won't know about... ;^)
About the Killer Anti-Psi 'bots. I don't think this is a good dodge for the
"official" anti-psi elements, at least for two reasons:
1) Only Telepaths have that natural psi shield. Not all psionics are
Telepaths.
2) "Normal" citizens wearing technological psionic shields would be
subject to very annoying attacks but these A-P 'bots. Considering that
a non-psi citizen wearing a psi shield is likely to be rich/important
or both, this might be a real bad move on the Imperium's part.
"High Governor Smith-Davies was attacked today by a warbot in his
office at the Palace. Preliminary investigation indicates that the
warbot was of a type used exclusively by the Imperial Navy.
The Imperial trade delegation was immediately expelled."
Please note, however, that any number of anti-psionic elements (including our
own metlay) might construct one or more such 'bots just to get at the nasty
psionic persons. Insert here your favorite Mad-scientist plotlines...
- -Bob (Nasty referee and secret psionic fan)