Thanks for noticing.
Seems it's only an issue for mails sent through gmane (and getting
scored), for people reading through gmane and relying on
gmane.spam.detection.
Now let's turn to people reading lists via
Gmane's NNTP interface.
To be able to see Platonides's messages, one needs to not have any
filter group=gmane.spam.detected action=discard
etc. in their readers.
Why would that rule be there?
Does any news reader include it by default? I haven't still seen spam on
any gmane ml, which would require filtering.