The whole point of the Caps Lock key is that you don't have to press it over and over.
Whew, so I'm not the only one... But why is that point lost on the modern crowd? Is nobody a touch typist anymore? I've been taught that capital letters are typed by pressing the Shift key on the opposite side of the key being input, which gets ridiculous if you have to enter a longish string of capitals, e.g., echo $LD_LIBRARY_PATH (and no, I might not be in a shell which lets me autocomplete that one, thanks for asking). So CapsLock is far from useless. Dual Ctrls likewise, by analogy with dual Shifts -- I'd never contort my fingers by typing Ctrl-T or Ctrl-B single-handedly, even if Ctrl were in the usual CapsLock position (which some people obviously prefer.)