I'll go against the grain and say cutting coil springs FOR THE PURPOSE OF MAKING SMALL ADJUSTMENTS to the front ride height is fine.
Yes, it reduces suspension travel... so do lowering springs. If we're talking about 1/4" or less, that can be compensated for in the bump stops.
Coil springs basically function like a torsion bar that has been wrapped around an axis. Shortening the length (measured along the coil windings) will increase the spring rate in the same way shortening a torsion bar would. For a coil suspension, the amount of force required to hit the bump stop is reduced by a smaller percentage than the reduction in suspension travel caused by shortening the spring.
Conversely, it is a commonly accepted practice to lower a leaf spring suspension with blocks or shackles which reduces travel without the benefit of increasing spring rate so I don't understand the "don't ever cut a coil spring" thing.
Is it the best method of accomplishing the desired result? Obviously not and sometimes (eg. coils that have tapered windings on both ends) it's not even possible. Would I do it to make a 1"+ ride height change? Nope.
That said, I've cut coils to make front end ride height adjustments on three vehicles and found the results perfectly acceptable. YMMV and all that but I definitely consider this option any time I'm looking to make small ride height changes, especially when a lowering spring isn't available.