I would like to register to 20 social bookmarking sites and to submit my bookmarks there. I am planning to post the same content for every site or maybe I spin the content a little bit . Is it OK to register with the same user name or is it better to change my user name every time? For example if I type someone?s user name on Google, many URLs with this user name appear . Maybe administrator of social bookmarking site will type my user name on Google and will see that I posted to many sites and will ban my account? Is it bad for administrator of social site? What do you say about this? Which is better to post with the same user name or to change it every time? Thank you!