Thank you Tom.  That is good to know.  Good to know there won't be negative SEO and yes, from a PR standpoint I will look into deleting some of the accounts.  Certain are less active just b/c they are more obscure and we'd rather focus on, like you said, those that convert.  Thank you for your reply.

I'm the Internet Marketing Manager for an ad agency and in charge of not only our social media and SEO but advising and hooking up clients with successful campaigns.

I've taken the liberty of signing us up for almost every major social media account.

Some are very successful (Facebook, Twitter, Pinterest, Instagram, LinkedIn, Vimeo is ok (we use it over YouTube), Vine is picking up) and others are very not doing well (Flickr, Foursquare, YouTube really is low, Google+ is very mediocre).  I’ve been wondering if it would be more beneficial to just delete certain accounts.  I think I need to keep Google+ (Google values it and we are not doing terribly on it) but all the others listed in the bad column I think are really cancerous to our SEO (and make us look bad b/c we are doing poorly on them) but I really don’t know.  I used them kind of to see if they would work for us and to demonstrate that we knew what we were doing in these social networks, but I think they may be doing us more harm than good both from a PR standpoint and SEO.  Doesn't it hurt your website for Google to see poor performing social media accounts, just as the opposite would be true (good sm accounts and mention/activity would give you klout & SEO...)?

What do you think?

I'm no novice but no master either.  Love this forum.  Thanks in advance.