Any low level key stroke filter out there

[Tom Horsley]

Google chrome Ctrl-V pastes utter nonsense, expanding URLs into the URL link
in the new commenting system on the Washington Post. I can't stand
it any longer. Is there a low level keystroke filter available for
fedora that would let me detect Ctrl-V and change it to Ctrl-Shift-V
before any app can see it and do something silly? (Naturally in the
0.000001% possibility I actually want the Ctrl-V default, I'd
want to swap the meaning of the two keystrokes).