Would a non-linux user visit any such sub-community though? Perhaps Linux news and discussions would be better off in a sub-community? Actual users are more sensible to such distinctions. Many potential new users have a hard time choosing a distro already. Adding yet another choice might be detrimental to the cause.
The opposite. Not found negatives. Anti-virus software can only tell you that it didn’t find a virus, not that there aren’t any.