Why Digg account is getting most often banned?

Hello to all,

Today, I would like to discuss here my problem what I am facing these days while doing SMO for my Blogs. I have Created my Blogs on Blogger.com and word press, Both of the sites, Where I am posting most often and by this way updating my contents regularly by using some great and unique scenarios. I always use to promote these blog posts on dig, delicious, and stumble upon type some excellent social book marking sites.

Now My concern is, Why digg accounts are getting banned very often while promoting these blogs there? Is there any key factor to keep in mind while promoting the blogs on dig and prevents my accounts from getting banned most often? I hope most of the member are using the same SMO techniques; I would like to ask with them, were they suffered ever with the same type of problem? please come up here and let us discuss to get resolved this type of issues with a proper and healthy solution.

Thanks in advance.