In summary:
1thWonder and Jazzy are the leaders of the mapper crew
For the old maps:
1) Definition of maps unplayable:
Maps that can't be finished under 6 minutes.
Maps badly made (too dark, bad handling, bad designed or poorly assembled, obviously boring)
Maps bugged
Maps extremely hard (Like the JJ_RedBull_AirRace series that are too hard for no regular players and they die one time and another like in a bucle
)
(add more if you have more ideas)
2) The mappers leaders post in a private topic the unplayable maps, the topic can be "maps to delete" and only this 2 members and mainadmins can access to it, this way the mainAdmins can delete the maps.
3) (optional) All the members can post in another topic only for SiK members "Maps to revise" if they find some maps with the point 1 conditions. The mapper leaders can revise them and post or not in the "maps to delete" topic if the maps are really unplayable. (this point can help to identify more unplayable maps)
For new maps:
Sexmaniac already test the new maps and his judgement is enough. But if he want, we can help him tesing the maps and rating or something like this in the same "maps" topic.
Furthermore, the mapper leaders can create another topic for share map stuff, like toolbox, tutorials, map scripting, new objects, dubts, tricks... Only for SiK members