Have read spotewelder's many [seasoned] observations about the risks of travelling on a *ONEx. Assuming that you're travelling in D class, what's your experience of being operationally up (or, perish the thought) downgraded?

How was it handled? (immediate/prompted offer of compensation in the negative); Here's your new boarding pass Sir / Madam (in the positive)? Nada?

Mine for starters: 3 DONE5/6s: none either way.