From another question related to the use of the Google search engine in combination with Stack Exchange, I found the following.
I have some accounts I solely use for flagging. Those profiles are set to hidden in my network profile. However, the user profiles do pop up in the search results in Google. And even worse, all those profiles put my actual contribution to page 17...
I know the sites hidden in your profile aren't really hidden, although this seems an unwanted side effect.
Can SE prevent the hidden profiles from popping up in Google? And if so, should they?
rel="nofollow"
on the network profile link it will solve what you describe, but would be "overkill' for those who do want their network profile to be indexed. So, not sure what I feel about it.rel="nofollow"
in the network profile Accounts tab, on any sites you hide. Now this one sounds ideal, and quite easy to implement.<meta name="robots" content="noindex">
tag thus not indexed. As long as you don't post anything on those accounts, you should be safe.