Well you got that giant header because you block ads and, as explained in that header, it is bad
The goal was getting people to disable the ad blocking on imcdb rather than removing that block...

Check in the options of AdBlocker to remove the rule that you added accidentally. There are normally options to see blocked items.


@Elmer > why should it be not visible for registered users? New visitors won't really care, that's more the regular users that should be concerned about the fact that they block ads on the site they use!