You know, I've got a BlackRapid that I only use when I have the 70-200 F/2.8 on my 5D3. I have a Wimberley Arca plate that I usually take off when I am using the BlackRapid... Do I need to? The plate's threaded hole is off-center of course, so it will torque the plate screw from repeated use, but I would never go so far as to loctite the plate down. Is the load from repeated 'draws' with the Black Rapid enough to unthread the plate screw?
Assuming you mean the Wimberley P-5, that plate's only anti-twist is the grippy material (unlike dedicated plates which have a lip in the design), so it might twist from the torque. Of course, you'd still have to unscrew the BR lug to connect the plate to a tripod/monopod clamp.
I don't think anyone is suggesting connecting a plate to the camera with Loctite (at least, I'm not). The idea is to connect the BR lug to a small clamp with Loctite, to give your BR strap the same quick release capability that you have with a tripod/monopod clamp.
A picture might help...