Should autocomplete() ignore more keys (CMD, CAPSLOCK)?

Should autocomplete() ignore more keys (CMD, CAPSLOCK)?

I realized that only SHIFT, ALT, CTRL are ignored in the autocompleted input field, others like CMD or CAPSLOCK trigger the search event. As this hits the server when using uncached remote data, I would consider it useful to include more keys. Is there a reason for not ignoring these two (and other) keys?