Possible spam hijacks

SQL

select concat('Category:',c.page_title) from page c
join page m on m.page_namespace=0 and m.page_title=
 concat(UPPER(CONVERT(SUBSTRING(c.page_title FROM 22 FOR 1) USING LATIN1)),
    SUBSTRING(c.page_title from 23 for 1000))
where c.page_namespace=14
and c.page_title like "%Wikipedians\_who\_read\_%"
and m.page_is_redirect=0
and not exists (select 1 from categorylinks where cl_from=c.page_id and (cl_to='Wikipedia_soft_redirected_categories'
 or cl_to like 'Categories_for_discussion_from%'))

        and not exists (select 1 from categorylinks where cl_from=m.page_id and (cl_to like "%uthor%")
        and not exists (select 1 from page hc join page_props on pp_page=hc.page_id where hc.page_namespace=14 and 
        hc.page_title = cl_to and pp_propname="hiddencat"))
        and not exists (select 1 from categorylinks where cl_from=m.page_id and (cl_to like "%novels%")
        and not exists (select 1 from page hc join page_props on pp_page=hc.page_id where hc.page_namespace=14 and 
        hc.page_title = cl_to and pp_propname="hiddencat"))
        and not exists (select 1 from categorylinks where cl_from=m.page_id and (cl_to like "%riter%")
        and not exists (select 1 from page hc join page_props on pp_page=hc.page_id where hc.page_namespace=14 and 
        hc.page_title = cl_to and pp_propname="hiddencat"))
        and not exists (select 1 from categorylinks where cl_from=m.page_id and (cl_to like "%omic%")
        and not exists (select 1 from page hc join page_props on pp_page=hc.page_id where hc.page_namespace=14 and 
        hc.page_title = cl_to and pp_propname="hiddencat"))
        and not exists (select 1 from categorylinks where cl_from=m.page_id and (cl_to like "%agazine%")
        and not exists (select 1 from page hc join page_props on pp_page=hc.page_id where hc.page_namespace=14 and 
        hc.page_title = cl_to and pp_propname="hiddencat"))
        and not exists (select 1 from categorylinks where cl_from=m.page_id and (cl_to like "%book%")
        and not exists (select 1 from page hc join page_props on pp_page=hc.page_id where hc.page_namespace=14 and 
        hc.page_title = cl_to and pp_propname="hiddencat"))
        and not exists (select 1 from categorylinks where cl_from=m.page_id and (cl_to like "%ewspaper%")
        and not exists (select 1 from page hc join page_props on pp_page=hc.page_id where hc.page_namespace=14 and 
        hc.page_title = cl_to and pp_propname="hiddencat"))
SQL

Checking query status...
