Is it neccessary for all default runit services (e.g. 6 TTYs) to be active? 
I usually never need more then 2 but when I remove TTY3-6 from /var/service 
the next update of the runit package puts them back in. I would propose 
that the links are only created via INSTALL file unless a corresponding 
/etc/sv/agetty-ttyX/down file is present. That is, if the TTY-directories 
in /etc/sv aren't completely overwritten at the next runit-void update, 
which I think they are...

Anyway, would this be a valid feature? Would someone other than me use it? 
:)