IMO, "scroll here" should be the default action for clicking on a scrollbar. There are already good keyboard shortcuts for page up and page down, but there cannot be a keyboard shortcut for "scroll here". It's wasting the capability of the mouse to duplicate keyboard functionality when you could be benefiting from unique mouse-only functionality.
Oh hell no. If you think "scroll here" is a sane default, you haven't experienced the pain of jumping possibly thousands of lines in a long document with an accidental click, and no easy way to go back to where you were.
mrob · · focus · HN ↗
GTK gets this right, and Qt does not.
userbinator · · focus · HN ↗
renehsz · · focus · HN ↗
Y-bar · · focus · HN ↗
Click in the scroll bar to
(•) Jump to the next page
( ) Jump to the spot that's clicked