I`m finally getting around to breaking down breadcrumbs into Microdata. What`s the policy on not anchoring a parent category?

Selected answers from the Dumb SEO Questions Facebook & G+ community.

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  W.E. Jonk: I don't think there is a specific rule. Personally I don't use breadcrumbs on the first level (i.e. home > about us) because I don't believe it will benefit my users. I do use it on the second level (i.e. home > about us >contact us). But it depends... In general if you already have a clear URL structure (i.e. example.com/about-us/contact) and you don't have deep pages
  (i.e. example.com/clothing/menswear/red/shirt/short-sleeves/omg-shirt.html)
  you don't really need breadcrumbs, but it can be a nice feature...
  
  To me, put the user first is the etiquette.
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  Seth Cole: Hey +W.E. Jonk, thanks for the feedback. I missed this yesterday somehow. My goal is to give the visitors a little extra clarity while increasing my rank. 'Ya know, two birds one stone kind'a thing. :-)
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  W.E. Jonk: From the expert panel in this weeks SEO Questions hangout on air on 02:17:49 into the YouTube video: https://dumbseoquestions.com/q/im_finally_getting_around_to_breaking_down_breadcrumbs_into_microdata_whats_the_policy_on_not_anchoring_a_parent_category
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  Seth Cole: Whoa, that's perfect. The title was my next question! Thanks!
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  Seth Cole: Double take! That is my question, ha ha! ;