indyank - 4:32 pm on Jul 3, 2013 (gmt 0)
Again declaring to google or others that they own these domains is not really necessary. If they cross-link and do other stuff to cross-promote sites, google have all the evidence to demote them. (Though Google don't or wouldn't do it for themselves).
As long as they maintain their independent entity status and users like them independently, they should be good for google. Google is said to do things for its users and not for smal site owners/webmasters.