Love it as a lyric, but don't like it musically, so don't play it very often. The unsettling, almost threatening aura this emits is quite impressive though.
To me it falls into the same serial killer-ish thematic and atmospheric category as Michael's Bones, Jack The Ripper and Spring-Heeled Jim, although the plural form gives it an unusual feeling of unity that makes it stand out.
I find the "keeping the population down" bit the most intriguing part of the lyrics and it always makes me wonder if he means
passively, by simply not having children, or
actively, by, you know, reducing the number of children of others
It works as a piece of performance art, but not as a pop song and in my opinion contributes to the patchiness of Maladjusted.
On a sidenote, if it was released today it could be seen as a comment on some of the more bizarre conspiracy theories...