I know personally one pilot that was very fortunate to survive the false glideslope captured from above, only to hit the planet at an unexpected location .......... he knows a lot about it.
He NEVER DIT IT AGAIN and NEVER WILL do it again.
That's fine. He discovered his limits and will adhere to them.
OTOH, a pilot with an ATP should be able to easily intercept a G/S from above, and use all his other instrumentation to confirm the G/S is reasonable, and not a false one.
On the 744 Vertical Speed and/or hand-flying are good options.