It's not an unreasonable question and the answer, at least regarding the 744, is that it's not recommended. The concern is over causing structural damage. That taken from the FCOM ie "flight manual". I suppose in an emergency if losing height is essential then maybe it is warranted.
As Wiggy points out, the "slam dunk" at SFO refers to being kept high on a downwind right hand pattern and then turned in well above the normal glideslope. It makes for a challenging manoeuvre especially at the end of a long flight. Also, you often have to fly an offset if you are landing 28R to avoid conflicting with any traffic approaching 28L. Still, the compensation is having a layover in lovely San Francisco.
