Mark Hansen wrote:

Well, if it's only a problem when an aircraft is on the ILS and it's below
800/2, and given that ATC isn't going to release an IFR departure if an
aircraft is on the ILS, then it doesn't appear to be a problem.

I'm not sure that's the only time it's a problem. It just the minimum
that the tower is required to keep the area clear. I would expect that
ILS can be interfered with regardless of the current weather.

I think the idea is that even a distorted GS will be accurate enough to get
you to within 800/2 of the runway.