Could blocked magazines no longer appear in Random Post and Random Thread sidebars?

A lot of the larger abandoned magazines are just spam pools now. I don't see their posts in my feed, but I don't like that the two sidesbars of random posts and threads are now just spam advertising sidebars. I triedblocking the magazines, but doesn't that prevent the posts from showing in those sidebars.

Now don't get me wrong, I love it when m/infosec advertises voodoo curses and revenge spells, but after the first time the joke wears thin, you know?