It's not a courtesy to drop 'other' time as a (F/M)C, you are SUPPOSED to not count it, you were riding passenger for civilian purposes. As to 'other' time as an MP, I guess it's no sweat if you were an IP, but if you just were an non-IP A/C out of the seats then THAT would be a courtesy, to allow you as a non-IP (regardless if you signed for the jet or not) to log that time as flying. I think... lol. It's probably not a big deal really, but if that 'other' time as an MP (non-IP) is what makes you squeak by the min PIC required then hmmmm....