Perhaps so, but as Google advises, design your site for your visitor.
If you are doing things to improve the usability of your site for your visitors and not for the Search Engines, then you are doing things right. More visitors mean more organic linking -- both through networking, emails referrals, and earned backlinks. Those things add up to more authority, which is something SE value highly. So, adding tags that help your visitor spend more time on your site is all good.
When I started on the web, you had to put on a pair of hip boots to find anything worthwhile in a Search Engine. It is not perfect now, by any means, but things are better than they were back then. Unfortunately, though, there will always be bottom feeders trying to rise to the top. Keyword stuffing their sites from the Title Element to the last word on a page. Good usability and good content will keep them down where they belong.
That's why SitePoint added this area. So let's keep the discussion to what is good for your content and let those worried about Search Engine results take their concerns to the SEO forum.