[W.]

I remember one that was a little dialog box on a web page from the mid 90’s that every time you got the mouse near the ‘Close’ button the box would move, trying to get you to chase it all around the page. One learned to close the page, instead...

[rlmorel]

I remember that too.

This is weirdly more insidious and irritating, because you fall for it a few times, figure it out (you think) but you don’t realize the timing changes, and you fall for it a few more times, until you realize the SOB made the response random.