The Mechanicus doesn't mind so long as people don't go off proselytizing or stealing Mechanicus secrets.  Given that an Ecclesiarchal representative and their bodyguard are being distinctly watched by a Mechanicus agent at all times (to their eyes) it excuses much of the risk.<br/><br/>Plus, when it comes to the Inquisition, they don't get a choice ;)<br/><br/>Shrine worlds are actually a hotbed for all sorts of Chaotic influences and splinter cults among the endless throngs of pilgrims, but Tech Heresy not so much.  There isn't really the capabilities for either the facilities or the personnel required for such a venture, without it being a MUCH larger scheme.  I tried to keep the overall influence in this 'pre-adventure' very small.