This should be both an interesting and a very important question to ask yourself. When it comes to your blog or your site, do you want your friends and family, that you know in person, to know about your blog?
With so many people focusing on getting their content indexed by search engines, it is becoming even more important for many people to find ways to have search engines stay away from their blogs. Why would anyone want search engines to not crawl their blogs? Well, there is one simple reason why: a blogger may not want their offline contacts to know about their blog.
Offline people knowing about your blog:
If your offline contacts know about your blog, your friends or family can probably easily find out about the business you do online, about the things you write about, about the way you express yourself to the online world, etc. Your offline contacts may also know that you write good or bad things about them, even if you use nicknames to describe them.
Offline people not knowing about your blog:
If your offline contacts do not know about your blog, your friends or family will not know about your online activities. If they search for your name, search engines may not show up any result since you may have worked hard to ensure that your site stays away from any search engine radars. You can blog about the people you know in person and they will not be able to easily find out that you are writing about them, even if you use their real names. Simply Precious is an example where a blogger is trying to blog while maintaining privacy from the offline world.
So, do you want your family and offline friends to find out and know more about your blog? Or do you want to keep your blog hidden from your offline friends? Do you want offline people that you know to visit your blog?
Please let me know, thank you. 
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