Been going on for a few days now. Drudge has also been hacked since yesterday. Won’t let me in, tells me to turn off my adblocker.
The code which replaces the Drudge content with a message if you are using an ad blocker isn't a hack, it is in the page source that Drudge is delivering and it looks like his team put it there. Apparently Drudge has decide he would rather have less readers.
The Javascript code looks to see if a particular ad server has been blocked, which a typical ad-blocker would do, and then replaces the Drudge report content with the message.
The script can be blocked off by a script blocker, or you can just skip reading Drudge's site.