Woulda, Coulda, Shoulda

Not that it matters much in the big scheme of things, and I'm sure you'll all just roll your eyes and say I'm up on my high horse again, but I really hate it when people write "would of" or "could of" or "should of" instead of "would have" or "could have" or "should have." For example:

The Iraq War would of never happened if only Congress could of done what it
should of and just said "No."

Please make the necessary adjustments.