I just found a bad plugin by Nmedia.
Take a look: http://wordpress.org/extend/plugins/nmedia-mailchimp-widget/
But! It also adds a hidden link, which can be triggered by a hover (at least in my theme) to Nmedia homepage. So my Question is - how do I report such plugin to be removed from WordPress.org ?
<a href="http://www.najeebmedia.com">PoweredBy: Nmedia</a>