Quote: Never touch the front brake while the wheels aren't dead straight, even at walking speed.
Gotta disagree with this one Rich. Using brakes in combination is a necessary skill to achieve the best performance. The technique of "trail braking" involves use of the front brake while in turns. Too much back brake can cause a traction loss.
In fact some times, I don't use the back brake, just the front. Of course you must always be aware of any potential traction compromising situations.
Never heard of that one either. Trail braking is a must in sport riding. I would not use the back brake much on a twisty unless you want to get a view of your rear tire.