need to hide usernames in the archives

[D0ubleStakked]

My forums uses people's full names as their usernames.
Previously, we have kept our forums hidden from search engine bots like Google.

Now, we are interested in opening up our forums to search engine bots, but we want to protect user privacy. Since we are a closed organization (membership required to read or write content), we want to get our brand name out there better when people search, but we don't want to give away any of our usernames.

Is there a Mod out there that does this?

we're currently running vBulletin 3.6.7.
Thanks,
-Brian