It's not Flash or Java or even Javascript, just plain old HTML. Dozens of us have requested that the "feature" be either user selectable or applied only to the text and not the entire table row in the forum thread view, but unsurprisingly the administrators are not receptive to our requests.I suppose if you completely disabled all flash and java then they might go away, but thats just silly.
I created an extension to remove this text, you can use it by downloading this file. If there's enough interest I may work further on it but for now it simply blocks that popup text.
