I have just received a popup on Neopets. I am 99% sure it came from Neo because it was for something called WinFix or some such, and it matched the ad currently showing in the top window.
It launched a Javascript application which I quickly tried to close, but that spawned further windows until my only option was to Ctrl+Alt+Del and terminate Firefox. This caused the computer to rapidly slow to a halt and required a cold restart.
I expect this was not blocked because I am running a rather out-of-date version of Firefox and therefore I probably only have myself to blame but I do not expect this kind of thing to occur on Neo. I don't use Adblock because I haven't thought that the ads were worth blocking. If they are goingto start doing this then maybe I'll have to.
Basically I'm just warning anyone to avoid clicking on anything if you get that popup (just shut down your browser immediately!), and asking has anyone else seen this one (it could conceivably be spyware on my computer I suppose)?
I got a screenie before the computer died so I'm sending that off to TNT now.
Edit:
Here it is (shrunken & with my acct details taken off)
As you can see it's pretty malicious in its appearance/wording.

I'm sure I did not inadvertently click on the banner - I wwas looking at my Tablet and had just clicked the 'Back to the Fortune Teller' button down near the bottom of the tablet page. The popup came straight up with the Fortune Teller page. I've emailed the Banner Ad email address but I don't hold out much hope of anything being done at this time on a Friday afternooon. [/url]
Edit2: I just got it again ::headslap:: It's still there - might be a wise idea to disable Javascript until TNT can confirm it has definitely been removed.