Cleaning up mailing lists?

[Thomas Pfeiffer]

Hi everyone,
recently I went through lists.kde.org and saw that there are lots of lists there 
for some short-term projects in the past, or for projects which have long since 
been abandoned.
Given that it probably doesn't give a good impression if someone subscribes to 
one of those lists only to notice that nothing has happened there for years, 
would it perhaps make sense to clean up our mailing lists, killing those that 
are not used anymore?
Cheers,
Thomas