I’m a bit unclear, but the 1953 WT seems to be talking about a specific situation where someone turns apostate, joins another religion, but for some reason still wants to attend the KH with a spouse. Which seems a strange scenario, but might explain the “unwanted intrusion” comment. It may not be a blanket statement that all DFed people are unwelcome, but there is enough Watchtower imprecision and ambiguity that it’s not entirely clear. Ironic since this QFR was apparently prompted by yet more imprecise language in an earlier QFR.
I do find it interesting that the 1953 article disallows the DFed person from sitting with family, because more recently Watchtower has claimed that they place no formal restrictions on where DFed people can sit in the KH.
When I was young it was traditional for DFed people to sit at the back in shame, sometimes quite a few. These days there are no DFed people at the back any more, just sick and nervous people who prefer to sit at the back for one reason or another.