> Ctrl+W or middle click on tab isn't that far off The point of shift x3 is that it's consistent across keyboard layouts including laptops. I have a laptop where the location of the ctrl key is moved inward to make room for the function key. I frequently hit Fn instead of Ctrl and don't realize what's happening until I look at my keyboard. And that's not when I'm in distress. Same goes for middle click. It's not a consistent interaction. On some laptops you can left click and right click to get a middle click. On my laptop, it's a three finger tap.

> Never mind that computers and internet access is ubiquitous enough these days that "using the family computer" for this sort of thing isn't really needed in the first place. In a normal situation, this is true, but this is UI design for people in extraordinary situations. Their abuser may have taken their cellphone or other devices and may not have a choice in what computer they use or when they have access to it.

Nothing about this prevents private windows or Ctrl+W (assuming they have another window open so it doesn't look suspicious that they're staring at a blank desktop), it just gives victims a quick action they can take to prevent immediate retaliation.