A chrome extension I use called stay focus has an option to require typing a long document exactly in order to disable it. Unfortunately it's trivial for even a mildly technical person to figure out how to get around it, so it's become useless for self control.
No, it counts keystrokes too, so that doesn't work. I haven't tried to get past it myself, but really all I'd do to sidestep it is go to incognito, or use one of my other browsers.
I mean the extension itself is very easy to bypass. Just right click on it and remove it or disable it. You can also go into incognito, or a different user, different browser, etc.