Comment by quesera

This generalizes to "Oh, I see you're running JavaScript. Let me harass you in all the ways I can think of until you relent and act according to my will instead of your own".

... and should be treated with exactly the amount of respect or deference it would be in real life -- avoid (don't follow links to sketchy sites), de-escalate or ignore (close the tab and walk away), or defend (block JavaScript).