The way I interpret it is that Andy and co. don't want Joe Average taking a look at the thread, seeing some 'advice' and then setting up their bike the exact same way without considering the vast range of other variables. Many a seizure will ensue and it probably keeps Andy up at night.
The member area is invisible to those who don't have it (I think) so it is safe.
This is one of the cleanest and most useful forums out there and though some may think Andy's rules are OTT, they work and keep this place as a virtual encyclopaedia for people like you and I.
I'm sure Andy will tell me off for stealing his lecturing thunder...
