We seem to have differing opinions on the FE side. If I understand correctly, Vauxhall says Foucault pendulums don't precess without some mechanical or magnetic trickery. He's given several opinions on how this might be done, but so far has not demonstrated that it can be done, nor has he demonstrated that it has in fact done in any case of a Foucault pendulum experiment.
Charles on the other hand, supported the fakery idea at first, also without providing any conclusive evidence, but then switched to the idea that the pendulum will actually precess as expected not due to Earth's rotation, but will in fact precess on a non-rotating Earth due to some combination of gravitational force, tension in the wire and instabilty of the point of suspension. After several attempts he has not made clear how this works.
On the RE side, the equation t=24hr/sin(L), where t is the period of precession, 24hr is the period of Earth's rotation, and L is the latitude where the pendulum is located, to predict how the pendulum will precess. Several examples of this actually working, including video demonstrations, experiment write ups, and publicly available Foucault pendulums have been given. Many of the examples were of apparently unmodified and unassisted pendulums. Where magnetically assisted pendulums were referenced, some detail of the magnetic sucker mechanism was given, including detail explaining how every effort is made not to alter the trajectory of the bob other than to accelerate it slightly in the direction it is already travelling to compensate for loss of momentum due to friction.
Now, after 26 pages of debate, I think it's clear that the FE side has given nothing substantial on the Foucault pendulum, citing only vague conspiracy theories, and confused sounding physical explanations that don't account for real world observations. Furthermore Vauxhall has been dishonest, by his own admission, regarding his alleged experiments. The RE side has clearly shown, by simple theoretical explanation and by reference to several verifiable experiments that Foucault pendulums do in fact precess due to rotation of the Earth.
Unless anyone has anything further to add, how do you all feel about putting this one to a vote and declaring a winner in this debate?