Cutting down on blog categories

Having too many blog categories for your post may be bad for SEO, according to this blog post from Take More Risks. According to the blogger:

So how many’s too many? I guess you have to take it on a blog by blog basis. Take More Risks is 5 months old and has just over 220 posts, I hardly think it’s deserving of over 30 categories. It seems as if I’m diluting my link authority by focusing on such a broad range of topics. It’d be beneficial to either remove all of my categories altogether or define broader types and move the posts to there. Topics like PHP, Javascript and Web Design might fall under “Technology” or something similar.

Well I have somehow managed to keep the categories of this blog to a minimum, even though the blog has been running for four months or so. He may have a point as having too many categories will duplicate the pages in a blog and the Google spider would detect it as duplicate site content and will not take it into consideration for their rankings, probably even to the extent of penalising the blog for duplicate content, as SEOBook documents. See how Shoemoney had managed to increase his Google search traffic by 1400% this past month by preventing some of his pages from being indexed. In short, cutting back on blog categories will be good for your blog in search engines in the long run. Trim up the fat and give more generalised categories for your blog posts.