Uncle Pug:
You are a hoover. You suck down half your al80 before even getting to the bottom. You discover your needle is in the red 15 minutes later and only then bother to inform the poor person assigned as your *buddy* what your air status is. You thumb the dive and expect them to accompany you to the surface. They do but still have 2/3 of their gas left. They paid $$$ for the dive trip but you've ruined it for them.
Do you feel any responsibility to recompense them?
Not at all.
I actually believe it is a very dangerous mind set to make the 'bad gas buddy' feel guilty about his or her gas consumption. When a dive is thumbed, it's thumbed. No reason, excuse or explanation necessary. Doesn't matter if this is due to a low-on-gas situation, bad viz, too heavy currents or the little green men from Mars.
Now, I
do understand that the easy breather
does get his or her dive ruined by the 'air hog', but it's part and parcel of the game. The way to avoid this is to
(1) dive with a known buddy only and
(2) agree your dive plan in advance.
Anybody who partakes in a dive trip solo and then is assigned a buddy must live with the consequences for that one dive. Been there, done that. On both sides of the fence. (Yes, 'air hog syndrome' is curable. Usually by diving more often.)
Of course, I'd insist on swapping partners for the
next dive. But that's another story.