But that doesn't mean you have the responsibility to put yourself in jeopardy for the sake of someone else. Sure, di Grassi could have pulled off the circuit and basically ruin his own race simply so that the leaders could get by. A better solution would have been to keep going through the first sequence of corners and let them through after the third turn.
I never said that, I said "if you are a lap down, you have lost your right to hold up the leaders".
This means, do not clearly block the leaders on purpose. I agree that the backmarkers should not be expected just to vanish, but I don't agree with letting them have free reign to affect the outcome of the race. Its not skillful to catch someone who has been held up by a HRT just because the cars and tracks don't lend themselves to overtaking.
If Kubica was chasing Webber for 1st place tomorrow, with no blue flag rules, and he got held up by a backmarker and lost the race, would this be better?
Di Grassi is a perfect example of how to do it badly. He didn't think, he just threw it to the side and onto the grass. I agree that drivers like him have got the wrong idea, they are still meant to race and they are not expected to avoid leaders like the plague like that. There is also an element of acceptance needed from the top drivers that they will inevitably be held up somewhere. But I think Hamilton had full rights to complain about Di Grassi because it was just idiotic what he did, he should have kept going, following a normal racing line. Instead he performed an unexpected maneuver, which makes it doubly hard for the leaders to react.
As far as I know, Di Grassi's race was already ruined anyway because he doesn't have a big enough fuel tank. Besides, usually lapped cars are not in much of a fight for places, considering most of them are the new teams.
The BBC today were semi-praising Schumacher for going out of his way to avoid blocking, but again, he was moving in unusual places which actually caused greater confusion to the driver behind and slowed them down further. Especially where he was effectively weaving before the hairpin, the Sauber visibly slowed down just to check which way he was going!
The standard way to allow drivers past is to maintain the racing line where possible and simply not to fight the faster car. This aids the faster car in predicting and reacting. If you have to move off the racing line and to an awkward position (like Schumacher and Di Grassi did) then you do not move over, you just continue, even if it momentarily blocks the faster cars, until you have a safer and more predictable spot to allow them to pass.
This is the principle I have always used while racing online, for example, I would never move out of the way on a corner like Dunlop at Suzuka beacuse its just awkward and unpredictable. The best places are the slow exits of corners or on straights, as the driver behind has plenty of time to react and would normally expect this.