If you wish to delete multiple Blacklist Monitors, all at once, in bulk, you can do so by using Group Actions.

Start by expanding the blacklist monitors list so as to contain as many monitors as possible:

Select all of the blacklist monitors in the list from the top checkbox on the left side, and then from the Group Actions drop-down menu, select “Delete”:

And finally, click the blue arrow button next to the Group Actions drop-down menu in order to process the deletion of the selected blacklist monitors.